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C3 GRAVITY

Total questions: 135

Worksheet time: 2hrs 3mins

Name
Class
Date
1.
What states that "every object in the universe attracts every other object"?
a)
Law of Universal Gravitation
b)
Newton's First Law of Motion
c)
My mother
d)
Inertia & gravity
2.
Force of gravity is inversely proportional to
a)
Mass
b)
Weight
c)
Distance
d)
Time
3.
If Earth's mass was cut in half, what would happen to your mass?
a)
increase because gravitational force increases
b)
decrease because gravitational force decreases
c)
decrease because gravitational force increases
d)
nothing, mass is not affected by gravitational force
4.

Calculate the gravitational force between two objects when they are 0.750m apart. Each object has a mass of 5.00kg.

a)

2.96x10-7N

b)

3.00x10-6N

c)

2.22x10-9N

d)

2.23x10-8N

5.
Two objects are attracted to each other with 36 N of gravitational force.
What would the force between them be if the distance between them were doubled?
a)
9
b)
18
c)
72
d)
144
6.
What is the Universal law of gravitation equation? 
a)
G=F ⋅ m⋅m2/r2
b)
F=G ⋅ m⋅m2/(r)2
c)
F=G ⋅ r2/m⋅m2
d)
G=F ⋅ r2/m⋅m2
7.
The law of universal gravitation is credited to whom?
a)
Einstein
b)
Galileo
c)
Darwin
d)
Newton
8.
Two factors effecting the magnitude of the force of gravity between 2 objects are...
a)
mass and distance 
b)
mass and matter
c)
distance and weight 
d)
weight and mass
9.
Gravity attracts all objects towards one another.
a)
False
b)
True
c)
It depends
10.

Two spherical objects have masses of 8000 kg and 1500 kg. Their centers are separated by a distance of 1.5 m. Find the gravitational attraction between them

a)

5.4 X 10-4 N

b)

1.2 X 107 N

c)

3.6 X 10-4 N

d)

5.33 N

11.
Complete the following statement: The farther away two planets are the _______ the gravitational force between them.
a)
more
b)
same
c)
dosen't matter
d)
less
12.
Gravity is the force objects put on each other because of their ______.
a)
Mass
b)
Friendliness
c)
Acceleration
d)
Speed
13.

Which configuration will result in the greatest gravitational force?

a)

small masses far apart

b)

large masses far apart

c)

small masses close together

d)

large masses close together

14.
Two factors effecting the magnitude of the force of gravity between 2 objects are...
a)
mass and distance 
b)
mass and matter
c)
distance and weight 
d)
weight and mass
15.
Force of gravity is inversely proportional to
a)
Mass
b)
Weight
c)
Distance
d)
Time
16.
Which of the following is Newton's Law on Gravitation?
a)
F=Gm1m2/r
b)
F = Gm1m2/r2
c)
F = Gm1m2/2r
d)
F = m1m2/2r
17.
What states that "every object in the universe attracts every other object"?
a)
Law of Universal Gravitation
b)
Newton's First Law of Motion
c)
My mother
d)
Inertia & gravity
18.

The sun is the anchor point of our solar system because of

a)

the gas Hydrogen

b)

its small density

c)

its huge mass

d)

its location

19.
The mass of a satellite influences the velocity at which the satellite orbits  a planetary body.
a)
true
b)
false
20.
Ocean tides occur mainly because 
a)
water normally runs to the side of Earth away from the sun
b)
of the gravitational pull of the sun on Earth
c)
of different gravitational pulls of the moon on opposite sides of Earth
d)
as Earth rotates it leaves the ocean water somewhat behind it
21.
How are mass and weight different?
a)
Mass is the amount of matter in an object;Weight is the amount of gravitational force acting on the object
b)
Mass is the amount of gravitational force acting on an object;Weight is the amount of matter in an object
c)
Mass is a thing;Weight is a place
d)
Mass is an animal;weight is a human
22.
Why don't satellites get closer to the Earth even though the Earth pulls on them?
a)
The pull from the sun cancels their movement
b)
The pull from the moon cancels their movement
c)
They are out of Earth's gravitational field
d)
They fall at the same rate that the Earth curves away from them
23.
The units of acceleration are
a)
kg
b)
m/s2
c)
m/s
d)
N
24.
The units of velocity are
a)
kg
b)
m
c)
m/s
d)
N
25.
When farther away from the sun, planets travel
a)
faster 
b)
slower
c)
at the same speed as if closer to the sun
26.
What is weight?
a)
The amount of particles in an object
b)
The force applied by gravity on a mass
c)
How much you weigh on Earth
d)
The number of Newton's of force your body applies to the ground. 
27.
If a feather and a hammer are dropped at the same time on the moon, where there is no atmosphere, which one will hit the ground first?
a)
Neither, there is no gravity on the moon.
b)
hammer because it has more mass
c)
feather because it has less mass
d)
both will hit at the same time
28.

What is the value of gravitation constant...

a)

3×108 ms−13\times10^8\ ms^{-1}

b)

6.67 ×10−11 Nm2kg−26.67\ \times10^{-11}\ Nm^2kg^{-2}

c)

6.63×10−9 Nm26.63\times10^{-9\ }Nm^2

29.

Newton's Law of Universal Gravitation affects

a)

All objects with mass in the known universe

b)

All objects and empty space in the known universe

c)

Thoughts and Ideas

d)

Only things that are the color red

30.

The gravitational pull is __________ proportional to the distance between two objects

a)

conversely

b)

directly

c)

pyrotechnically

d)

inversely

31.

Which is the formula for Newton's Law of Universal Gravitation?

a)

F = G * m1m2 / r

b)

F = G * m1m2 / r2

c)

F = G * m1m2 / 2r

d)

F = m1m2 / 2r

32.

The distance between the Earth and the Moon centres is 3.8 × 108 m. The mass of the Earth is, me= 5.97 × 1024 kg

and the mass of the Moon is, mm = 7.36 × 1022 kg. What is the gravitational force between the Earth and the Moon?

(G = 6.67 × 10-11 N m-2 kg-2)

a)

2.03 x 1021 N

b)

2.03 x 1020 N

c)

4.03 x 1020 N

d)

4.03 x 1022 N

33.

The mass of the Sun is 2.0 × 1030 kg and the mass of the Earth is, me = 5.97 × 1024kg. The distance from the Earth is 1.50 × 1011km. What is the gravitational force between the Sun and the Earth?

(G = 6.67 × 10-11 N m-2 kg-2)

a)

1.54 x 1022 N

b)

2.54 x 1022 N

c)

3.54 x 1022 N

d)

4.54 x 1022 N

34.

A rocket of 2.5 x 104 kg moves from Earth to the moon. The mass of the Earth is me = 5.97 × 1024kg. Calculate the Earth’s gravitational force on the rocket when its distance from the Earth is 1.0 x 109 m. (G = 6.67 × 10-11 N m-2 kg-2)

a)

9.95 N

b)

8.95 N

c)

10.95 N

d)

9.81 N

35.

Newton’s Universal Law of Gravitation states that the gravitational force between two objects is directly proportional to the product of masses of the two objects and inversely proportional to

a)

distance between the two objects.

b)

square of the product of the body’s radii.

c)

square of the distance between the centres of the two objects.

d)

cube of the distance between the centres of the two objects.

36.

If the distance between two particles is doubled, what

happened to the gravitational force between them?

a)

Is reduced to one-fourth of the original value

b)

Is reduced to half of the original value

c)

Becomes double

d)

Becomes four times

37.

Which of the following can be applied by the Universal Law of Gravitation?

a)

The planets around the Sun

b)

The Earth and the moon

c)

The Earth and the apple

d)

Any pair of bodies

38.
Which represents the acceleration of the ball?
a)
A
b)
B
c)
C
d)
D
39.
Which of the following increase the centripetal force?
a)
Increasing the radius
b)
Increasing the velocity
c)
Decreasing the mass
d)
Decreasing the acceleration
40.
A horse gallops around a circular arena.  The centripetal force on the horse is ___.
a)
directed outward
b)
tension
c)
directed toward the center of the arena
d)
9.8 N
41.
A car with mass m travels around a curve with velocity v. What do you know about the centripetal force if the velocity triples?
a)
Nothing 
b)
The centripetal force triples
c)
the centripetal force multiplies by 9
d)
The centripetal force divides by 3
42.
Which of the following terms means "center seeking"?
a)
centrifugal
b)
centrifuge
c)
centripetal
d)
centenarian
43.

If m1 = 2 kg, m2 = 9 kg, and r = 3 m , then what is the magnitude of the initial acceleration of m2?

a)

G2m2\frac{G}{2m_2}

b)

G4m2\frac{G}{4m_2}

c)

2Gm2\frac{2G}{m_2}

d)

4Gm2\frac{4G}{m_2}

44.
Which of the following increase the centripetal force?
a)
Increasing the radius
b)
Increasing the velocity
c)
Decreasing the mass
d)
Decreasing the acceleration
45.
When an object is in circular motion it is constantly changing its velocity.
a)
True
b)
False
46.
The centripetal force of satellites is similar to gravitational force because they are both a net force towards the center of earth.
a)
True
b)
False
47.

A car is rounding a bend as shown in the diagram. Which arrow correctly shows the direction of the cars velocity?

a)

A

b)

B

c)

C

d)

D

48.

If car A and car B are both traveling at the same speed, which will require a higher centripetal force?

a)

Car A

b)

Car B

c)

They have the same centripetal force

49.

A bola is an old hunting instrument. If three rocks with a combined mass of 0.75 kg are spun at a speed of 20 m/s with a radius of 0.5 m, how much centripetal force is required to keep them spinning.

a)

600 N

b)

45 N

c)

30 N

d)

400 N

50.

moving or tending to move toward a center...

a)

centripetal force

b)

centrifugal force

c)

Tangent

d)

Curvature

51.
When an object is in circular motion it is constantly changing its velocity.
a)
True
b)
False
52.

Why does velocity happen when going in a circle even if you are going the same speed?

a)

The direction around the circle changes at every point.

b)

Velocity does not change

c)

Because direction is the same around the circle

d)

Neither

53.

If velocity increases force will....

a)

increase because they have a direct relationship

b)

increase because they have a inverse relationship

c)

decrease

d)

both

54.
Where is the net force when the rollercoaster is at the top of the loop?
a)
Towards the sky
b)
Towards the Right
c)
Towards the left
d)
Towards the ground
55.
You swing a bucket of water attached to a string in a circle above your head. What keeps the water in the bucket?
a)
Friction
b)
Centripetal Force
c)
Gravity
d)
Inertia
56.
This picture was taken form the International Space Station.  Gravity keeps the space station in orbit.
a)
True
b)
False
57.
Inertia is always tangent to the centripetal force.
a)
True
b)
False
58.
The centripetal force of satellites is similar to gravitational force because they are both a net force towards the center of earth.
a)
True
b)
False
59.
Decreasing the radius when making a turn allows you to____?
a)
Increase your friction
b)
Keep a high speed
c)
Change your inertia
d)
Decrease gravitational pull
60.

A 10kg car travels at a constant speed of 20.0 m/s around a horizontal circular track. Which diagram correctly represent the direction of the car's velocity (v) and the direction of the centripetal force (Fc) acting on the car at a particular moment?

a)
b)
c)
d)
61.
Planets orbit the Sun in a shape called a(n)
a)
circle
b)
ellipse
c)
focus
d)
perihelion
62.
Where is the planet moving faster
a)
Position A to B
b)
Position B to C
c)
Position H to I
d)
Position I to J
63.
What is true about the area between points A, B and the Sun, and the area between points H, I and the Sun?
a)
The area between A, B and the Sun is the largest.
b)
The area between H, I and the Sun is the largest
c)
Both areas are equal in size
d)
There is not enough information to determine the areas
64.
Kepler's 2nd Law deals with 
a)
the shape of the planets' orbits
b)
the speed/area the planet travels 
c)
the length of time it takes the planet to orbit the sun
65.
A planet moves __________ when it is farthest from the sun.
a)
faster
b)
slower
66.
Kepler's first law states that the orbits of the planets are oval in shape or 
a)
ellipses
b)
perfect circles
67.
The farther away a planet is from the sun, the _______ it takes it to orbit the sun once. 
a)
longer
b)
shorter
68.
The path a planet travels around the sun is called its 
a)
orbit
b)
ellipse
c)
barycenter
d)
precession
69.
What are the two factors that influence gravity the most?
a)
Mass and weight
b)
Weight and gravity
c)
Mass and distance
d)
Weight and distance
70.
According to Kepler's 3rd law, the square of the time it takes for an object to orbit, T, is directly related to the cube of the distance, r, between the object and what it is orbiting.            
a)
 T3 = k*r2
b)
T2 = k*r3
c)
T3 = k/r2
d)
T2 = k/r3
71.
Using Newton's law of gravity:
F = Gm1m2/d2.
What will happen to the gravitational force of a satellite if the mass and the distance from Earth’s center is doubled?
a)
G4m1m2/d2
b)
G3m1m2/2d2
c)
G3m1m2/d2
d)
Gm1m2/d2
72.
Using Newton's law of gravity: 
F = Gm1m2/d2. 
G=6.67x10-11 NM2/KG2
Calculate the force between two objects that have masses of 70 kilograms and 100 kilograms separated by a distance of 1 meter. Use  “G” for the Gravitational constant.
a)
0.0000466
b)
4.66x107
c)
-0.000000466
d)
4.66x10-7
73.
In order for a satellite to orbit in a higher orbit, what must be true about its speed
a)
The orbital speed must be decreased
b)
The orbital speed must be increased
c)
The orbital speed must remain the same
d)
There is not enough information to draw a conclusion
74.
Consider the model of Kepler's 2nd Law. Each colored wedge represents the same time interval. Kepler states that the area of each wedge must be equal. According to this, what conclusions can you draw about the movement of any planet?
a)
An orbiting body travels along the perimeter of the segments at a constant velocity.
b)
An orbiting body travels faster as it gets closer to the central massive body.
c)
The path of each planet around the sun is an ellipse because the sun is located at one focus.
d)
An orbiting body covers the same distance for each time interval because the speed changes.
75.
Kepler’s first law states that planets travel in a(n)  orbit.
a)
Circular
b)
Spherical
c)
Elliptical
d)
Triangular
76.
When Earth orbits around the sun, it slows down when it is close to the sun. It speeds up its orbit when it is further from the sun. This is because the sun's gravity is stronger when you are closer to it.
a)
Kepler's 1st law
b)
Kepler's 2nd law
c)
Kepler's 3rd law
d)
Nutation
77.
What did Kepler discover about planets and their orbital speed?
a)
Planets closest to the Sun will orbit with the fastest orbital speed.
b)
Planets with the greatest mass will orbit the Sun with the fastest orbital speed.
c)
Planets furthest from the Sun will orbit with the fastest orbital speed.
d)
Planets with the least mass will orbit the Sun with the fastest orbital speed.
78.

Kepler's 3rd law tell us that __ would be dependent on __.

a)

orbital period ; distance

b)

distance ; orbital period

79.
When do planets move the fastest?
a)
Close to the sun
b)
Far away from the sun
80.

The diagram below shows a moon revolving around a planet in an elliptical orbit. At which position is the moon traveling fastest?

a)

location 1

b)

location 2

c)

location 3

d)

location 4

81.

The diagram below shows a moon revolving around a planet in an elliptical orbit. At which position is the moon traveling slowest?

a)

location 1

b)

location 2

c)

location 3

d)

location 4

82.

A year on Jupiter is 4,344 days long. This tells you how long it takes

a)

Jupiter to orbit the sun.

b)

Jupiter to rotate one time on its axis.

c)

the sun to orbit Jupiter.

d)

Earth to orbit Jupiter.

83.

What causes Earth’s year to be shorter than Jupiter’s year?

a)

the gravitational pull of Jupiter’s moons

b)

the shape of Earth’s orbit around the Sun

c)

the distance between Earth and the Sun

d)

the mass and density of Jupiter

84.

Which planet will take the least amount of time to revolve around the Sun?

a)

Mercury

b)

Venus

c)

Earth

d)

Mars

85.

Which planet will take the most amount of time to revolve around the Sun?

a)

Mercury

b)

Venus

c)

Earth

d)

Mars

86.

Which statement best describes Kepler’s 2nd Law of Planetary Motion?​

a)

Planets revolve around the sun over equal areas in equal time intervals.

b)

Planetary orbits are in the shape of an ellipse.

c)

A planet’s orbital period is proportionate to its distance from the sun.

87.

What unit to we usually use to to measure a planet's orbital period?

a)

light year

b)

year

c)

day

d)

astronomical unit

88.
According to Kepler's 3rd law, the square of the time it takes for an object to orbit, T, is directly related to the cube of the distance, r, between the object and what it is orbiting.    
What this means is that if a satellite moves away from what it is orbiting,
a)
the larger the constant k is.
b)
the smaller the constant k is.
c)
the longer the orbital period is.
d)
the shorter the orbital period is.
89.

Which of the following shows correctly the relationship between the period of orbit, T and radius of orbit, r, of a planet?

a)

A

b)

B

c)

C

d)

D

90.

Diagram shows the planet Saturn with its four satellites. R and T are orbital radius and orbital period of satellites respectively.

Which of the following statements is true?

a)

the orbital periods of all the satellites are the same.

b)

The force on the satellite is tangential to the orbit

c)

the attractive force on each satellite is directly proportional to 1R2\frac{1}{R^2}

d)

T3R2\frac{T^3}{R^2} is constant for all satellites.

91.

What is the reason for the motion of the moon on its orbit?

a)

The gravitational force exerted on the Earth by the moon

b)

The gravitational force exerted by the sun

c)

The gravitational force exerted by the planets

d)

The gravitational force exerted on the Moon by the earth

92.

The period of geostationary artificial satellite is

a)

24 hours

b)

6 hours

c)

48 hours

d)

12 hours

93.

If r represents the radius of the orbit of a satellite of mass m moving round a planet of mass M the velocity of the satellite is given by

a)

V=(GMr)V=\sqrt{\left(\frac{GM}{r}\right)} ,

b)

v2 = GMmrv^2\ =\ \frac{GMm}{r}

c)

v=GMmr2v=\frac{GMm}{r^2}

d)

v2 = gMRv^2\ =\ \frac{gM}{R}

94.

Kepler's third law is represented by the following equation:

Hukum Kepler ketiga ditunjukkan oleh  persamaan:

a)
b)
c)
d)
95.

The period of the Moon's orbit is 27.0 days. The radius of the Moon's orbit is 3.8 ×1083.8\ \times10^8  m. The period of a geostationary satellite is 1 day. What is the radius of the geostationary satellite's orbit. 

a)

4.2 ×1074.2\ \times10^7  m

b)

5.4 ×1075.4\ \times10^7  m

c)

6.6 ×1076.6\ \times10^7  m

d)

8.5 ×1078.5\ \times10^7  m

96.

The accelerations due to gravity on the surfaces of two planets are equal in magnitudes if

a)

mass

b)

massradius\frac{mass}{radius}

c)

massradius2\frac{mass}{radius^2}

d)

massradius3\frac{mass}{radius^3}

97.

Planets orbit the sun in a shape called an ellipse.

a)

Kepler's 1st Law

b)

Kepler's 2nd Law

c)

Kepler's 3rd Law

98.

Planets travel faster when they are closer to the sun.

a)

Kepler's 1st Law

b)

Kepler's 2nd Law

c)

Kepler's 3rd Law

99.

The areas swept by an invisible line between the sun an the earth will be

a)

larger if the earth moves for the same amount of time

b)

equal if the earth moves for the same amount of time

c)

smaller if the earth moves for the same amount of time

100.

What causes the sun to appear to rise, move across the sky, and set each day

a)

earth's orbit around the sun

b)

revolution of the moon around the earth

c)

rotation of the sun

d)

rotation of the earth

101.

Astronauts live in the ____________________ and conduct experiments.

a)

International Space Room

b)

International Space Station

c)

International Space Rocket

d)

International Space House

102.
People can find out their exact location on Earth by using a...
a)
Global Drection System (GDS) receiver.
b)
Regional Positioning System (RPS) receiver.
c)
Global Positioning System (GPS) receiver.
103.
A satellite that travels in an orbit that exactly matches the Earth's rotation is traveling in a(n)
a)
low Earth orbit (LEO).
b)
low stationary orbit (LSO).
c)
geostationary orbit (GEO).
d)
high Earth orbit (HEO).
104.

The velocity a rocket must achieve to establish an orbit around another object in space

a)

Orbit Velocity

b)

Velocity

c)

Space shuttle

d)

probe

105.

The velocity a rocket must reach to escape from a planet or moons gravitational pull

a)

Vacuum

b)

Satellite

c)

Escape velocity

d)

Geosynchronous orbit

106.
Which of the following is needed to calculate escape speed for a rocket from earth?
a)
mass of fuel used in the rocket
b)
mass of the rocket
c)
mass of Earth
d)
all of the above
107.

Calculate the escape velocity of a satellite in an orbit 300 km above Earth’s surface. Given G = 6.67 x 10^-11 N m^2 kg^-2, radius of earth is 6370 km and mass of the earth is 5.97 x 10^24 kg.

a)

7.73 km s^-1

b)

10.9 km s^-1

c)

36.4 km s^-1

d)

244 km s^-1

108.

Which of the following is true about non-geostationary satellites?

a)

Its orbital period around the earth is one day.

b)

It is at a height of (35000-36000) km above the equator of surface of the earth.

c)

Example of the satellites are GPS.

d)

It can be in an orbit of which is very close to the surface of the earther or very further away from the surface of the earth.

e)

Example of the satellites are communication satellites.

109.

Two satellites orbit a moon. Satellite A and Satellite B. Satellite B is twice as far away from the moon. Its speed should be ____

a)

half as much as the speed of A

b)

less than the speed of A but not exactly half as much

c)

twice as great as the speed of A

d)

greater, but not twice as great as A

110.

A satellite orbits a moon at radius r, if the moon were to gain a significant amount of mass from asteroid collisions, the speed of the satellite will ___

a)

increase

b)

decrease

c)

remain unaffected

d)

depends on the mass of the satellite

111.

A space donut orbits a planet in an elliptical orbit... The donut is moving the SLOWEST at ____ (see image)

a)

r1

b)

r2

c)

it is the same speed at every part of its orbit

d)

none of the above

112.

Man-made satellites are launched into space using __________.

a)

airplane

b)

jetplane

c)

rockets

d)

balloons

113.

Man-made satellite is __________.

a)

an object that is revolve around the Sun

b)

an object that is placed in orbit around the Earth

c)

an object that is launched to the Moon

d)

an object that is revolve around the Earth

114.

The velocity a rocket must reach to escape from a planet or moons gravitational pull

a)

Vacuum

b)

Satellite

c)

Escape velocity

d)

Geosynchronous orbit

115.

M represented in the formula is the mass of...

M di dalam formula adalah jisim untuk...

a)

A

b)

B

116.

Which of the following shows the formula to calculate escape velocity of an object from the surface of the Earth?


Antara berikut yang manakah menunjukkan formula untuk mengira halaju lepas sesuatu objek dari permukaan Bumi Bumi?

a)
b)
c)
d)
117.
Which of the following is needed to calculate escape speed for a rocket from earth?
a)
mass of fuel used in the rocket
b)
mass of the rocket
c)
mass of Earth
d)
all of the above
118.

Two satellites of equal mass are in circular orbit around a planet. Satellite b is twice as far out. Which feels a stronger gravitational force?

a)

Satellite a

b)

Satellite b

c)

Both the same

119.

Which arrow drops to the ground first?

a)

A

b)

B

c)

Same time

120.

The escape velocity of a 10g body from the earth is 11.2km/s.Ignoring air resistances, the escape velocity of 10kg of the iron ball from the earth will be

a)

0.0112km/s

b)

0.112km/s

c)

11.2km/s

d)

0.56km/s

121.

Gravitational PE= (a)   x mass

122.

If g be the acceleration due to gravity at the earth surface, then what will be the increase in potential energy if object of mass m is raised by its radius R?

a)

1/2mgR

b)

2mgR

c)

mgR

d)

1/4mgR

123.

Consider a body of mass m which needs to be moved from an orbit of radius 2R to 3R. What is the energy required

a)

GMm/R

b)

GMm/R2

c)

GMm/6R2

d)

GMm/6R

124.

The escape velocity of a sphere of mass m from earth having mass M and radius R is given by

a)

GMR\sqrt{\frac{GM}{R}}  

b)

2GMR\sqrt{\frac{2GM}{R}}  

c)

GM2R\sqrt{\frac{GM}{2R}}  

d)

4GM/R\sqrt{\text{4GM/R}}  

125.

ve and vp denotes the escape velocity from the earth and another planet having twice the radius and the same mean density as the earth. Then

a)

vp= ve

b)

vp = 2ve

c)

vp= 4 ve

d)

2vp= ve

126.

The escape velocity from the earth is about 11 km/second. The escape velocity from a planet having twice the radius and the same mean density as the earth, is

a)

11km/s

b)

5.6km/s

c)

22km/s

d)

55.6km/s

127.
A force of attraction between 2 object that is directly related to mass and indirectly related to distance.
a)
mass
b)
weight
c)
gravity
d)
kilogram
128.
As the distance between 2 objects increases, what happens to gravitational force?
a)
increases
b)
decreases
c)
stays the same
d)
i don't know
129.
What is gravity?
a)
A force
b)
Energy
c)
A push
d)
All of them
130.

Which of the following is the most accurate description of "escape velocity"?

a)

Escape velocity is the velocity needed to get away from the Earth's gravitational force.

b)

Escape velocity is the velocity needed to get away from the Earth's gravitational force and is dependent upon the mass of the satellite.

c)

Escape velocity is the velocity needed to get away from the Earth's gravitational force and not dependent upon the mass of the satellite.

d)

Escape velocity is the velocity needed to get away from the Earth's gravitational force and not dependent upon the mass of the satellite but is dependent upon the geometric structure of the launch vehicle.

131.

When in orbit around the Earth, what is true about the relationship between a satellite's distance from the Earth's surface and its velocity in order for the satellite to stay in its orbit?

a)

A satellite's distance and velocity are inversely proportional; that is, the satellite must travel more quickly to stay in orbit.

b)

A satellite's distance and velocity are directly proportional; that is, the satellite must travel less quickly to stay in orbit.

c)

A satellite's velocity is not affect by its distance from the Earth's surface.

d)

The distance from the Earth's surface is only dependent upon the mass of the satellite.

132.

As an object moves further from the surface of the Earth, what happens to its mass?

a)

The mass of the object will not vary as it moves further from the surface of the Earth

b)

The mass of the object will decrease as it moves further from the surface of the Earth.

c)

The mass of the object will increase as it moves further from the surface of the Earth.

133.

According to Einstein's Theory of Relativity, which of the most accurately describes time?

a)

Time is a human construct and is constant

b)

Time is a human construct and varies depending upon where an object is in space

c)

Time is relative and varies depending upon how fast an object are traveling

d)

Time is relative and varies depending upon how fast an object is traveling; the faster an object is traveling the slower time passes

134.

Finish the sentence: "The greater the thrust, the _________ the rocket's velocity."

a)

smaller

b)

greater

135.

This image represents (select all that apply)

a)

orbital velocity

b)

escape velocity

c)

an elliptical (oval) orbit

d)

a perfectly circular orbit

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