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F4 3.1 Newton’s Universal Law of Gravitation.

Total questions: 60

Worksheet time: 1hrs 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)

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