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Circular Motion and Gravitation

Total questions: 75

Worksheet time: 3600secs

Name
Class
Date
1.

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.

2.

According to Newton's law of gravitation, the Earth and the Moon are gravitationally attracted to each other. The more massive Earth attracts the Moon with...

a)

a stronger force than the Moon attracts the Earth.

b)

a weaker force than the Moon attracts the Earth.

c)

the same force as the Moon attracts the Earth.

d)

a force that is sometimes stronger and other times weaker than the Moon attracts the Earth.

3.

Which of the following best explains why a person has less weight on top of a mountain?

a)

They are closer to space.

b)

The atmosphere is lighter.

c)

The mountain adds more mass.

d)

The mountain adds more distance.

4.

The picture shows three objects gravitationally interacting with each other. Which object exerts the greatest force on object B?

a)

Object A

b)

Object C

c)

A and C exert an equal force on B

d)

Cannot be determined

5.

The picture shows three objects gravitationally interacting with each other. Which object exerts the greatest force on object B?

a)

Object A

b)

Object C

c)

A and C exert an equal force on B

d)

Cannot be determined

6.

A massive object and a less massive object exert a gravitational force on each other. Which of the following picture correctly shows the magnitude and direction of the forces involved in this interaction?

a)
b)
c)
d)
7.

The gravitational force in the previous interaction was 20 N. Determine the gravitational force in the new situation where the second mass is doubled.

a)

10 N

b)

20 N

c)

40 N

d)

80 N

8.

The distance between the two masses in the previous situation is halved. Determine the gravitational force in this new situation.

a)

20 N

b)

40 N

c)

80 N

d)

160 N

9.

The picture shows two identical satellites, A and B, in circular orbits around the Earth. Upon which satellite does the Earth exert a stronger gravitational force?

a)

Satellite A

b)

Satellite B

c)

Equal on both

d)

Cannot be determined

10.

The Earth exerts a gravitational force of 12 N upon satellite B. Satellite A is twice as far away from the Earth as satellite B. Determine the gravitational force the Earth exerts on satellite A.

a)

3 N

b)

6 N

c)

12 N

d)

24 N

11.

A third identical satellite, C, is placed in orbit at half the distance from the Earth as satellite B. Determine the gravitational force the Earth exerts on satellite C.

a)

6 N

b)

12 N

c)

24 N

d)

48 N

12.

The picture shows two situations of two objects gravitationally attracting each other. What is the proportional change in the second mass of situation 2 as compared to situation 1?

a)

1/2

b)

1

c)

3

d)

6

13.

The picture shows two situations of two objects gravitationally attracting each other. What is the proportional change in distance of situation 2 as compared to situation 1?

a)

1/2

b)

1

c)

2

d)

4

14.

The picture shows two situations of two objects gravitationally attracting each other. What is the proportional change in the gravitational force in situation 2 as compared to situation 1?

a)

1/4

b)

1/2

c)

1

d)

2

15.

The picture shows three bodies (A, B, and C) that gravitationally attract each other. Between which two bodies is the force of gravity the strongest?

a)

A and B

b)

A and C

c)

B and C

d)

Equal for all

16.

The picture shows the gravitational field in the space surrounding the Earth. What is creating this gravitational field?

a)

The gravitational force.

b)

The mass of the Earth.

c)

The distance of the Earth.

d)

The universal gravitational constant.

17.

The figure shows the gravitational field surrounding the Earth. Which of the following explains why the field lines point towards the Earth?

a)

Gravity is an attractive force.

b)

The force of gravity points towards the center of the Earth.

c)

Falling bodies accelerate towards the center of the Earth.

d)

All of the above.

18.

An apple is placed in the Earth's gravitational field. Which of the following best explains why the apple falls to the ground?

a)

The field exerts a gravitational force upon the apple.

b)

The Earth exerts a gravitational force upon the apple.

c)

Masses attract each other.

d)

On Earth, all objects fall with acceleration 9.8 m/s².

19.

Which of the following statements is correct with respect to G and g?

a)

G is a fundamental constant, whereas g is a physical quantity and subject to change.

b)

Both G and g can change, but g can only change if you go to a different planet.

c)

G and g are both constant, but g is determined by the mass and radius of the Earth.

d)

The strength of G is determined by g.

20.

The surface gravity on Earth is approximately 10 N/kg. What would the surface gravity be if the Earth contained twice as much mass?

a)

5 N/kg

b)

10 N/kg

c)

20 N/kg

d)

40 N/kg

21.

Suppose an exoplanet is found that has the same mass as the Earth, but is slightly larger than the Earth. What would be the surface gravity on this planet?

a)

less than 10 N/kg

b)

equal to 10 N/kg

c)

more than 10 N/kg

d)

cannot be determined

22.

A newly discovered exoplanet has triple the mass and double the radius as compared to Earth. What is the approximate surface gravity on this exoplanet?

a)

1.5 N/kg

b)

7.5 N/kg

c)

15 N/kg

d)

60 N/kg

23.

The picture shows two exoplanets, b and c. The mass and radius of each planet is given in terms of M and r. What is the surface gravity on planet-c if the surface gravity on planet-b is 4 m/s2?

a)

2 m/s2

b)

4 m/s2

c)

8 m/s2

d)

32 m/s2

24.

The mass and radius of four exoplanets are shown in terms of the Earth's mass and radius. On which of these planets will the surface gravity be greater than on Earth?

a)

planet-b

b)

planet-c

c)

planet-d

d)

planet-e

25.
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
26.
Force of gravity is directly proportional to
a)
Mass
b)
Weight
c)
Distance
d)
Time
27.
Force of gravity is inversely proportional to
a)
Mass
b)
Weight
c)
Distance
d)
Time
28.
Two asteroids exert a gravitational force, F, on each other. Some time later, the asteroids are now three times as far from each other as before. Which of the following represents the gravitational force at this distance? 
a)
F/3
b)
F/2
c)
F/6
d)
F/9
29.
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
30.
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
31.

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

32.
A moon is located at  1 unit out from the planet it orbits. If that moon was orbiting at 2 units out from the planet, how much would the gravitational force on the moon be compared to its distance at 1 unit?
a)
1/4
b)
1/6
c)
2x as much
d)
4 times as much
33.
The mass of a satellite influences the velocity at which the satellite orbits  a planetary body.
a)
true
b)
false
34.
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
35.
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
36.
What is the value of g on Earth?
a)
9.81 m/s^2
b)
9.81 N
c)
9.81 m
d)
9.81 s/m^2
37.
The force of gravity acting on an object is the object's ______.
a)
Mass
b)
Matter
c)
Weight 
d)
Terminal velocity 
38.
Determine the motion of the car.
a)
at rest 
b)
constant velocity 
c)
speeding up
d)
slowing down
39.
Determine the motion of the car.
a)
at rest 
b)
moving at constant speed
c)
speeding up
d)
slowing down
40.
A drag racer accelerated from 0 m/s to 200 m/s in 5 s.  What was the acceleration?
a)
0 m/s
b)
40 m/s2
c)
-40 m/s2
d)
40 m/s
41.
What is velocity?
a)
the quickness of an object
b)
the location of an object
c)
acceleration
d)
speed in a specific direction
42.
How far will a person go if they jog for 2 hours at a speed of 12 km/hr?
a)
6 km
b)
0.5 km
c)
10 km
d)
24 km
43.
Calculate the velocity of an object moved around a circle with a radius of 1.65 m and an acceleration of 3.5 m/s2.
a)
2.4 m/s
b)
3.6 m/s
c)
3.9 m/s
d)
4.2 m/s
44.
You are moving a ball in a circle using 72 N of centripetal force. What would the force be if you doubled the velocity of the circle?
a)
244 N
b)
288 N
c)
36 N
d)
72 N
45.
Double the mass of an object, what happens to the force of attraction?
a)
4 times stronger gravity force
b)
4 times weaker gravity force
c)
2 times weaker gravity force
d)
2 times stronger gravity force
46.
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
47.
Force of gravity is inversely proportional to
a)
Mass
b)
Weight
c)
Distance
d)
Time
48.
Two asteroids exert a gravitational force, F, on each other. Some time later, the asteroids are now three times as far from each other as before. Which of the following represents the gravitational force at this distance? 
a)
F/3
b)
F/2
c)
F/6
d)
F/9
49.
Which of the following depict the speed of the bowling ball?
a)
A
b)
B
c)
C
d)
D
50.
Centripetal acceleration is the acceleration…
a)
Away from the center of the circle
b)
When an object is going straight
c)
Toward the center of a circle
d)
That doesn’t exist
51.
What force keeps planets in orbit around the Sun?
a)
Friction
b)
Gravity
c)
Momentum
d)
Velocity
52.
As the product of two objects' masses increases, the pull of gravity
a)
Increases
b)
Decreases
c)
Stays the same
53.
A particle P is moving in a circle with uniform speed. Which one of the following diagrams correctly shows the direction of the acceleration a and velocity v of the particle at one instant of time?
a)
A
b)
B
c)
C
d)
D
54.
If the force of gravity has been reduced by 1/4 which could be true?
a)
Mass was increased 4 times
b)
Mass was decreased 2 times
c)
Distance was increased 4 times
d)
Distance was doubled
55.
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
56.
Bruno the bat flies at a speed of 0.5 m/s in circle of radius 1 m. What is his acceleration?
a)
0.25 ms-2
b)
0.5 ms-2
c)
1 ms-2
d)
2 ms-2
57.
Which statement is true about an object that is traveling in uniform circular motion?
a)
The speed of the object varies.
b)
The net force on the object is directed toward the center of the circular path.
c)
The direction of the object's velocity is constant.
d)
The net force on the object is directed away from the center of the circular path.
58.
What happens to an object's speed as the radius decreases?
a)
It increases.
b)
It decreases.
c)
It remains unchanged.
59.
A pilot experiences centripetal acceleration of 2g's while maneuvering a loop at a speed of 400 m/s.  What is the radius of the loop?
a)
203 m
b)
8163 m
c)
80,003 m
d)
23 m
60.
Calculate the mass of an object if it took 20 N to rotate it in a circle with a radius of 2 meters with a velocity of 4 m/s
a)
4.1 kg
b)
3.6 kg
c)
2.5 kg
d)
1.8 kg
61.
What is the relationship between centripetal force and the mass of an object?
a)
direct
b)
inverse
c)
exponential
d)
inverse squared
62.
Which of the following is the unit for centripetal force?
a)
J
b)
m/s2
c)
kg⋅m/s
d)
N
63.
A 50 g model airplane travels in a circle with a radius of 100m, the plane's velocity while moving is 50m/s, at a frequency of 5 spins per 9 seconds, What is the proper equation to use to solve for the Centripetal force?
a)
Fc = mv2 / r
b)
Fc = 4π2mr / T2
c)
Fc = 4π2mrf2
d)
Fc = ma
64.
As distance between two objects increase the pull of gravity 
a)
Increases
b)
Decreases
c)
Stays the same
65.
Which of these is the same everywhere?
a)
G
b)
g
c)
Fg
d)
weight
66.
Which of the following is a fictional force that pushes outward as something moves in a circle?
a)
Centripetal Force
b)
Gravitational Force
c)
Centrifugal Force
d)
Normal Force
67.
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
68.

Which of the following ranks the tensions in the strings from highest to lowest?

a)

A>C>D>B

b)

B>D>C>A

c)

B>C>A>D

d)

D>A>C>B

69.

Which expression could be used to calculate the force acting on a ball, where m = ball mass, v = ball velocity, and t = time?

a)

mv/t

b)

mv2/2

c)

mv2/t

d)

mv/2t

70.

How do you compare the gravitational force of A from B?

a)

gravitational force of A is twice that of B

b)

gravitational force of A is half compared to B

71.

How does the speed in Case A compare to the speed in Case B?

a)

two times

b)

one fourth times

c)

four times

d)

one half times

72.
Which of the following will not change in different gravitational fields?
a)
weight
b)
force
c)
mass
d)
pounds
73.
The number 6.67 x 10 -11 N* m^2 / kg^2 is called the _______________.
a)
universal speed constant
b)
the speed force
c)
universal gravitational constant
d)
Earth's gravitational constant
74.

The time taken for one complete cycle is called the...

a)

Period

b)

Frequency

c)

Angular velocity

75.

What happens to an object's speed as the radius is cut in half?

a)

It is halved

b)

It doubles

c)

It remains unchanged.

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