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Universal Gravitation Practice Quiz

Total questions: 86

Worksheet time: 3hrs 4mins

Name
Class
Date
1.

Newton's Universal Law of Gravitation explained about...

a)

Gravitational force

b)

Magnetic force

c)

Centripetal force

2.

what is the factors that affect gravitational force

a)

mass, distance

b)

speed, distance

c)

momentum, mass

3.

what is the relationship between mass of object and distance between objects..

a)

mass increase, gravitational force increase

b)

mass increase, gravitational force decrease

c)

mass decrease, gravitational force increase

4.

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

5.

If one of two objects increases its mass, it _________ the gravitational pull between the two objects

a)

increases

b)

decreases

c)

has no effect on

d)

eliminates

6.

If one of two objects decreases its mass, it _________ the gravitational pull between the two objects

a)

increases

b)

decreases

c)

has no effect on

d)

eliminates

7.

If two objects increase their distance, it _________ the gravitational pull between the two objects

a)

increases

b)

decreases

c)

has no effect on

d)

eliminates

8.

If two objects decreases their distance, it _________ the gravitational pull between the two objects

a)

increases

b)

decreases

c)

has no effect on

d)

eliminates

9.

The gravitational pull is __________ proportional to the mass of object 2

a)

conversely

b)

directly

c)

phonetically

d)

inversely

10.

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

a)

conversely

b)

directly

c)

pyrotechnically

d)

inversely

11.

Every object with mass is gravitationally attracted to each other object with mass in the entire universe.

a)

True

b)

False

12.

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

13.

According to Kepler's first law, the paths of the planets are circular in shape.

a)

True

b)

False

14.

(a)   have highly elliptical orbits.

Choose from the below words
Planets
Satellites
Comets
15.

Which law states that the areas at equal time intervals of a planet are equal?

a)

Kepler's first law

b)

Kepler's second law

c)

Kepler's third law

d)

Newton's law of universal gravitation

16.

Planets are faster when closer to the Sun because

a)

Distance is greater, time is greater

b)

Distance is greater, time is smaller

c)

Distance is smaller, time is smaller

d)

Distance is greater, time is the same

17.

Which equation represents Newton's law of universal gravitation?

a)

Fg=Gm1m2rF_g=\frac{Gm_1m_2}{r}  

b)

Fg=m1m2Gr2F_g=\frac{m_1m_2}{Gr^2}  

c)

Fg=Gm1m2r2F_g=\frac{Gm_1m_2}{r^2}  

d)

Fg=Gm1r2m2F_g=\frac{Gm_1r^2}{m_2}  

18.

When the distance between two objects is doubled, in terms of Fg,F_g, the force of gravity between them will be (a)  

Choose from the below words
4Fg4F_g  
12Fg\frac{1}{2}F_g  
14Fg\frac{1}{4}F_g  
19.

The force of gravitation between two 5.0 kg balls that are 1.5 m apart is (a)  
Use G=6.67×10−11 N.m2kg2G=6.67\times10^{-11}\ \frac{N.m^2}{kg^2}  

Choose from the below words
7.4×10−10 N7.4\times10^{-10}\ N  
1.1×10−9 N1.1\times10^{-9}\ N  
20.

A 500 kg asteroid is located 3.4 x107m from the center of Earth. The mass of Earth is 6.0x1024 kg. What is the gravitational force between the asteroid and Earth?

F = GMm/r2

G= 6.67 x 10-11

a)

1.73 x 102 N

b)

4.63 x 105 N

c)

2.94 x 103 N

d)

6.42 x 104 N

21.

How is the gravitational force between two objects related to their masses?

a)

They are directly proportional

b)

They are inversely proportional

c)

They do not affect each other

d)

They are equal to each other

22.

What happens to gravitational force between two object if both masses are doubled?

a)

doubles

b)

half as big

c)

4x bigger

d)

4x smaller

23.

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

24.

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

25.

Gravity attracts all objects towards one another.

a)

False

b)

True

c)

It depends

26.

What fundamental scientific principle states that "every object in the universe attracts every other object"?

a)

Law of Universal Gravitation

b)

Newton's First Law of Motion

c)

Opposites attract

d)

Inertia & gravity

27.

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

28.

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

29.

Here mass 1 is clearly bigger than mass 2. Compare their forces.

a)

The magnitude of the force on mass 1 is bigger than on mass 2

b)

The magnitude of the force on mass 2 is bigger than on mass 1

c)

The magnitude of the force on both mass 1 and mass 2 are the same

d)

The masses of the objects must be known to compare their forces of attraction.

30.

If the mass of the Earth is labeled mE, the mass of object A is m, and the radius of the Earth is R, then what is the gravitational force between them?

a)

GmEmR\frac{Gm_Em}{R}

b)

GmEmR2\frac{Gm_Em}{R^2}

c)

G(mE+m)R\frac{G\left(m_E+m\right)}{R}

d)

G(mE+m)2R\frac{G\left(m_E+m\right)}{2R}

31.

The space shuttle is orbiting the Earth clockwise. Which vector shows the direction of the gravitational force acting on the shuttle?

a)

a

b)

b

c)

c

d)

d

32.

The space shuttle is orbiting the Earth clockwise. Which vector shows the direction of the shuttle's tangential velocity?

a)

a

b)

b

c)

c

d)

d

33.

Which diagram best shows the gravitational interaction between Earth and a satellite?

a)
b)
c)
d)
34.

What type of interaction is a gravitational force? 

a)

Attractive

b)

Repulsive

c)

Attractive and repulsive

d)

No interaction exists. 

35.

In the earth-moon system the moon orbits the earth. What is the "centripetal" force causing the moon to stay in orbit around the earth? 

a)

Tension

b)

Friction

c)

Normal 

d)

Gravity 

36.

A rocket moves away from the surface of Earth. As the distance r from the center of the planet increases, what happens to the force of gravity on the rocket?

a)

The force doesn’t change

b)

The force increases directly proportional to 𝑟2

c)

The force decreases inversely proportional to 1/𝑟2

d)

The force becomes zero after the rocket loses the contact with Earth

37.

If three balls of steel, rubber, and plastic were dropped at the same time from the same height IN A VACUUM, which would hit the ground first?

a)

All would hit at the same time.

b)

The rubber ball would hit first.

c)

The steel ball would hit first.

d)

The tennis ball would hit first.

38.

A crumpled piece of paper hits the ground before a flat sheet of paper because

a)

the acceleration of gravity is greater on the flat paper.

b)

there is more air resistance on the crumpled piece of paper.

c)

there is more air resistance against the flat paper.

d)

the acceleration of gravity is greater on the crumpled paper.

39.

Which of the following DOES NOT describe weight?

a)

is constant on any planet

b)

is measured in Newtons

c)

is a measure of gravitational force

d)

changes as a gravitational force changes

40.

Which force opposes motion between two surfaces that are touching?

a)

thrust

b)

magnetism

c)

gravity

d)

friction

41.

What happens to the gravitational force between two objects if the mass of one object is halved?

a)

It doubles

b)

It halves

c)

It remains the same

d)

It quadruples

42.

Which of the following best describes the relationship between gravitational force and distance?

a)

Gravitational force is directly proportional to the square of the distance

b)

Gravitational force is inversely proportional to the distance

c)

Gravitational force is inversely proportional to the square of the distance

d)

Gravitational force is directly proportional to the distance

43.

Which of the following statements is true about gravitational force?

a)

Gravitational force only acts on objects with large masses

b)

Gravitational force acts only in the presence of air

c)

Gravitational force acts between any two masses

d)

Gravitational force is stronger than electromagnetic force

44.

How is the gravitational force between to objects related to their mass

a)

They are directly proportional

b)

They are inversely proportional

c)

They do not affect each other

d)

They are equal

45.

How is the gravitational force between to objects related to their distance (radius apart)

a)

They are directly proportional

b)

They are inversely proportional

c)

They do not affect each other

d)

They are equal

46.

If the distance between 2 masses is increased then the force of gravitation between them will...

a)

increase

b)

decrease

c)

stay the same

47.

Halving the distance between two objects...

a)

...will double the force of gravity.

b)

...will half the force of gravity.

c)

...will quadruple the force of gravity.

d)

...will quarter the force of gravity.

48.

If Mass 1 is doubled (2m) and Mass 2 is tripled (3m) it will..

a)

...will double the force of gravity.

b)

...will triple the force of gravity.

c)

...will multiply the force of gravity by a factor of six

d)

...will reduce the force of gravity by a factor of six

49.

If Mass 1 is doubled (2m) and the distance between the two masses is doubled (2r) it will...

a)

...will double the force of gravity.

b)

...will halve the force of gravity.

c)

...will multiply the force of gravity by a factor of four.

d)

...will reduce the force of gravity by a factor of four.

50.

What is the value of gravitation constant...

a)

3×108 ms−13\times10^8\ ms^{-1}

b)

6.673 ×10−11 Nm2kg−26.673\ \times10^{-11}\ Nm^2kg^{-2}

c)

6.63×10−9 Nm26.63\times10^{-9\ }Nm^2

51.

Newton said that any two masses will...

a)

combine into a larger mass.

b)

attract each other.

c)

create gravitational fields.

d)

push each other apart.

52.

The gravitational force between the two spheres is 40N.

Scenario: The distance between the two masses is then halved. What will the magnitude of the new force be when this happens.

a)

20 N

b)

40 N

c)

80 N

d)

160 N

53.

Newton said that any two masses will...

a)

combine into a larger mass.

b)

attract each other.

c)

create gravitational fields.

d)

push each other apart.

54.
Luke Skywalker has a mass of 13 kg and weight of 127.4 N on earth. Find his weight on the Endor moon. Acceleration due to gravity of 2 m/s/s.
a)
254.8 N
b)
13 kg
c)
26 N
d)
127.4 kg
55.
Gravitational force between two massive spheres 
a)
is always an attraction
b)
depends on how massive they are
c)
depends inversely on the square of the distances between them
d)
all of the above
56.
If the mass on Mars is 6.4 kg x 1023 kg and the mass on Earth is 6.0 kg x 1024 kg, which one would you weigh more on?
a)
Earth
b)
Mars
57.

What happens to Gravitational force if I double both of the masses but don't change their distance?

a)

doubles

b)

half as big

c)

4 times bigger

d)

4 times smaller (1/4)

58.

If you double the distance between m1 and m2 and triple the mass of m1, by what factor will gravitational force change?

a)

3/4

b)

3/2

c)

4/3

d)

5

59.

The only time when a skydiver's weight is equal to their actual weight during a fall is

a)

When they are experiencing air resistance greater than their actual weight

b)

when falling at constant speed as a result of built up air resistance which is equal to their weight.

c)

when falling in a free fall scenario

60.

Newton did not discover gravity, he discoved that

a)

The earth is flat

b)

That gravity is universal

c)

the moon moves in a straight line

d)

That universal law of gravitation is the same as Newton's 2nd law of motion

61.

Is the force of gravity stronger on a piece of iron than on a piece of wood if both have the same mass?

a)

Iron

b)

Wood

c)

Same force

62.

Why doesn’t Earth’s gravitational pull cause the moon to crash into Earth?

a)

Because the moon has a tangential velocity which keeps it moving but at the same time falling due to gravity

b)

Because the force of gravity is repulsive

c)

Becaus the force of gravity is a weak force

d)

Because the force of gravity by the sun on moon is stronger than that of the Earth on moon.

63.

The gravitational force between the two spheres is 40N.

Scenario: The distance between the two masses is then halved. What will the magnitude of the new force be when this happens.

a)

20 N

b)

40 N

c)

80 N

d)

160 N

64.

The gravitational force between two bodies of masses m1 and m2 separated by distance r is F. State the effect on the gravitational force when m1 increases twice.

a)

2F

b)

1/2 F

c)

4F

d)

4F

65.

The more mass an object has, the faster it will fall.

a)

Aristotle - TRUE; Galileo - TRUE

b)

Aristotle - FALSE; Galileo - FALSE

c)

Aristotle - TRUE; Galileo - FALSE

d)

Aristotle - FALSE; Galileo - TRUE

66.

What shape is Earth's orbit?

a)

circle

b)

ellipse

c)

square

d)

spiral

67.

The law of universal gravitation is credited to whom?

a)

Einstein

b)

Galileo

c)

Cavendish

d)

Newton

68.

Who of the following first described the shape of the earth's orbit?

a)

Aristotle

b)

Kepler

c)

Galileo

d)

Newton

69.
If a bowling ball and a feather were dropped at the same time, in a room with no air resistance (vacuum), which object will hit the ground first?
a)
Bowling Ball
b)
Feather
c)
Both would hit at the same time
d)
Neither one would hit the ground because air is what pushing things down.
70.

Who is credited with discovering the Gravitational constant, even though he got it wrong at first for measuring edge to edge and not center to center?

a)

Galileo

b)

Kepler

c)

Newton

d)

Cavendish

71.

The gravitational constant used in the Universal Gravitation Formula is:

a)

6.63 x 10-34

b)

6.02 x 10-23

c)

6.67 x 10-11

d)

6.65 x 10-29

72.

Who came first?

a)

Einstein

b)

Galileo

c)

Cavendish

d)

Newton

73.

What scientist first determined that objects of different masses fall at the same speed?

a)
Albert Einstein
b)
Isaac Newton
c)
Galileo Galilei
d)
Marie Curie
74.

To achieve a stable orbit, the speed of an object must be balanced with.....

a)
gravitational force
b)
frictional force
c)
centrifugal force
d)
magnetic force
75.

Kepler first theorized that orbits were .....

a)
parabolic
b)
circular
c)
elliptical
d)
hyperbolic
76.

Copernicus theorized that

a)

The stars rotated around the earth

b)

The earth rotated around the sun

c)

The earth was flat

d)

The earth rotated around the stars

77.

Copernicus: Wrote the famous publication __________.

a)

On the Revolutions of the Heavenly Spheres

b)
The Prince
c)
The Canterbury Tales
d)
The Art of War
78.

Ptolemy: __________ Philosopher.

a)
Indian
b)
Roman
c)
Chinese
d)

Egyptian

79.

Aristotle was a Greek, ____________.

a)

Philosopher

b)
chef
c)
musician
d)
scientist
80.

Ptolemy: __________ Philosopher.

a)
Indian
b)
Roman
c)
Chinese
d)

Egyptian

81.

This diagram shows three models that represent the gravitational force, F, between objects.

What do the arrows represent in the models?

a)

the mass of the objects

b)

the direction of the force

c)

the direction the object will be pushed

82.

Match the following concepts with their correct units

a)

mass

1.

kg

b)

velocity

2.

m/s

c)

acceleration

3.

m/s2

d)

distance

4.

m

e)

Weight

5.

N

83.

Which planet has the weakest gravitational pull?

a)

Earth

b)

Mercury

c)

Jupiter

d)

Venus

84.
Which system has the greater gravitational attraction between the two objects (if any)?
a)
System A
b)
System B
c)
Same gravitational attraction fro System A and System B
85.
Which System has the greater gravitational pull between the two objects?
a)
System 1
b)
System 2
c)
Same: there is no gravitational attraction between the two objects
86.
A person would weigh less on on the Moon than on the Earth because . . .
a)
Moon has more mass, and therefore more gravity
b)
Moon has less mass, and therefore more gravity
c)
Moon has more mass, and therefore less gravity
d)
Moon has less mass and therefore less gravity

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