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Review: LUG and UCM

Total questions: 81

Worksheet time: 2hrs 33mins

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 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

3.

what is the factors that affect gravitational force

a)

mass, distance

b)

speed, distance

c)

momentum, mass

4.

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

5.

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

6.

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

7.

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

8.

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

9.

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

10.

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

a)

conversely

b)

directly

c)

phonetically

d)

inversely

11.

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

a)

conversely

b)

directly

c)

pyrotechnically

d)

inversely

12.

A direct relationship between two parts of an equation means:

a)

One part doesn't beat around the bush when it wants to address something sensitive between the two

b)

One part tells the other where to stand, how to use their body language, and deliver lines for a scene to elicit the proper reaction from audiences

c)

If one increases in value, the other decreases in value

d)

If one increases in value, the other increases in value

13.

A inversely proportional relationship between two parts of an equation means:

a)

One part grabs the top part of a halfpipe and stands upside down on a skateboard or snowboard

b)

One part is quiet, kinda keeps to themselves, isn't really outgoing to socialize with others, but is okay with it all and is more comfortable in smaller group settings.

c)

If one increases in value, the other decreases in value

d)

If one increases in value, the other increases in value

14.

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

a)

True

b)

False

15.

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

16.
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
17.
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
18.
The mass of a satellite influences the velocity at which the satellite orbits  a planetary body.
a)
true
b)
false
19.
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
20.
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
21.
The force of gravity on Jupiter is a little more than 2 times the gravitational force on Earth. If an object has a mass of 50 kg and a weight of 490 N on Earth, what would be the object's approximate mass and weight on Jupiter?
a)
50 kg and 490 N
b)
100 kg and 490 N
c)
50 kg and 980 N
d)
100 kg and 980 N
22.
A planet moves fastest during its orbit around the Sun at the when 
a)
it is closest to the sun and gravity has a stronger pull
b)
it is farthest from the sun and gravity has a stronger pull
c)
it is closest to the sun and gravity has a weak pull
d)
it is farthest from the sun and gravity has a weak pull
23.
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
24.
A person on the Earth weighs 180 pounds. How much will they weigh on the moon? ( Note: The moons "g" is1/6 that of Earth)
a)
30 lbs
b)
360 lbs
c)
0- you are weightless in space
d)
18 lbs
25.

The Net Force between the two spheres is 40N.

Scenario: The distance between the two masses is then halved. How much will the numerator be divided by?

a)

2d2=4d

b)

.5d2= .25d

c)

2d

d)

.5d

26.

If I double the distance between two objects, what happens to their gravitational Force?

a)

4x bigger

b)

4x smaller

c)

2x bigger

d)

2x smaller

27.

If you double the mass of an object, how will the gravity force it exerts on other objects be affected?

a)

Gravity force will double.

b)

Gravity force will be 1/4 as much.

c)

Gravity force will be 1/2 as much.

d)

Gravity force will not be affected.

28.

Distance and Gravitational Force are ___ proportional.

a)

Directly

b)

Inversely

c)

Not

29.

Mass and Gravitational Force are ___ proportional.

a)

Directly

b)

Inversely

c)

Not

30.

Which of the following would be a proper setup for this problem: A 60 kg person is standing on earth's surface (radius = 6.4x106 m). The mass of earth is 6x1024 kg.

a)

(6.67x10−11)(60)(6x1024)(6.4x106)2\frac{\left(6.67x10^{-11}\right)\left(60\right)\left(6x10^{24}\right)}{\left(6.4x10^6\right)^2}

b)

(6.67x10−11)(60)(6.4x106)(6x1024)2\frac{\left(6.67x10^{-11}\right)\left(60\right)\left(6.4x10^6\right)}{\left(6x10^{24}\right)^2}

c)

(6.67x10−11)(60)(6x1024)(6.4x106)\frac{\left(6.67x10^{-11}\right)\left(60\right)\left(6x10^{24}\right)}{\left(6.4x10^6\right)^{ }}

d)

(60)(6x1024)(6.4x106)2\frac{\left(60\right)\left(6x10^{24}\right)}{\left(6.4x10^6\right)^2}

31.

If two objects are brought closer to 1/2 the original distance, by what factor would the gravity force between them change?

a)

1/2 as much

b)

2 x as much

c)

4 x as much

d)

1/4 as much

32.

If two objects are moved to a distance 3 x further than they were before. How would the gravity force between them change?

a)

It would be 3x larger.

b)

It would be 1/3 as large

c)

It would be 1/9 as large

d)

It would be 9x larger

33.

A planet and a moon have a gravity force between them of Fg. If the planet was 3x more massive and they were moved 3x further apart. How much gravity force would there be between them?

a)

3 Fg

b)

1/3 Fg

c)

9 Fg

d)

1/9 Fg

e)

1/27 Fg

34.

A curved groove is place on the top of a level table as shown in the diagram. A ball is pushed in the groove at P so that it leaves at Q. Which picture shows how the ball will move when it leaves the groove at Q?

a)
b)
c)
d)
35.

At the instant shown in the diagram, the car's centripetal acceleration is directed-

a)

toward E

b)

toward N

c)

toward W

d)

clockwise

36.

At the position shown in the diagram, which arrow indicates the direction the instantaneous (tangential) velocity of the cart?

a)

A

b)

B

c)

C

d)

D

37.
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
38.
What object experiences uniform circular motion?
a)
A car speeding up as it turns left
b)
A car traveling around a roundabout at a constant speed
c)
A car slowing down as it crests a tall hill
d)
A car traveling down the road at a constant speed
39.
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
40.
The velocity is always _____ to the line of a circle. 
a)
outwards
b)
towards the center
c)
tangent
d)
faster
41.
If the radius of the string is .3 meters long and the stopper makes 5 revolutions per second, what is the speed of the stopper? (Hint: C=2πr)
a)
9.4 m/s
b)
6.8 m/s
c)
11.7 m/s
d)
3.5 m/s
42.
What happens to an object's speed as the radius decreases?
a)
It increases.
b)
It decreases.
c)
It remains unchanged.
43.

The drum of a washing machine rotates 600 times in 1 minute. What is the frequency of the drum?

a)

600 Hz

b)

10 Hz

c)

0.1 Hz

d)

0.002 Hz

44.

An object is moving with uniform speed in a counterclockwise, horizontal circle. Which of the following images correctly depicts the force vector and velocity vector at a point in time.

a)
b)
c)
d)
45.
For a rotating rigid body, which of the following statements is NOT correct?
a)
All points along a rotating rigid body move with constant speed
b)
Points along a rotating body have velocities that continuously change directions
c)
Points along a rotating body move through the same angle in equal time intervals
d)
All of the answers are correct
46.

Which has greater angular velocity, a horse near the outside rail of a merry-go-round or a horse near the inside rail?

a)

The inside horse

b)

The outside horse

c)

Neither - they both have the same angular velocity

47.
When you carry a heavy load with one arm, why do you tend to hold your free arm away from your body?
a)
To change the mass of your body
b)
To be ready to grab something in case you fall
c)
To look good
d)
To change the center of gravity of your body and the load
48.
An object will fall over if its center of gravity is 
a)
outside the object.
b)
too low.
c)
not over its area of support
d)
too high.
49.

Stars originate as large bodies of slowly rotating gas. Because of gravity, these clumps of gas slowly decrease in size. What happens to the angular speed of the star as it shrinks?

a)

It rotates faster.

b)

It rotates slower.

c)

It starts to accelerate in the forward direction.

d)

The rotation rate stays the same.

50.

Jack and Rose are holding hands and spinning in a circle as fast as they can. If Rose lets go by accident, what can you say about Jack's motion?

a)

it will be in a straight line opposite of Rose

b)

it will be in a straight line in the direction of the instantaneous velocity

c)

it will be in a curved path in the direction that he was originally going

d)

Rose said she would never let go... she lied

51.

The time required for one complete revolution is:

a)

torque

b)

frequency

c)

period

d)

rotational kinetic energy

52.
Which represents the acceleration of the ball?
a)
A
b)
B
c)
C
d)
D
53.

Categorize something that is measured in radians per second

a)

Linear Distance

b)

Angular Distance

c)

Linear Speed

d)

Angular Speed

54.

2 cars are moving at the speed of 22 m/s.

the radius of the 1st vehicle's tire is 22 cm

and of the 2nd vehicle's tires is 30 cm. which tire has a greater angular speed?

a)

the 1st car

b)

the 2nd car

55.

A bug on a turning phonograph record will make more turns per minute if it is located toward the center of the record.

a)

True

b)

False

56.
A tin can whirled on the end of a string moves in a circle because 
a)
the can continually pulls on the string.
b)
once the can starts moving, that is its natural tendency.
c)
there is a force on the can pulling it outward.
d)
there is an inward force acting on the can.
57.
A ball on a string is travelling in circular motion. Which vector represents the centripetal force?
a)
The green vector because it points towards the center of the circular path
b)
The blue vector because it shows the direction of the object's inertia
c)
The green vector because it shows the path of the ball
d)
The blue vector because this is the way the ball will move when it is released.
58.

There are 360 ___________ in one revolution of a circle.

a)

Gradiens

b)

Radians

c)

Degrees

d)

None of the Above

59.

The angular velocity is represented by the Greek letter ____.

a)

ω

b)

θ

c)

α

d)

σ

60.
Convert 150⁰ to radians
a)
5π/6
b)
3π/4
c)
7π/6
d)
2π/3
61.
Convert π/4 radians to degrees
a)
90⁰
b)
45⁰
c)
60⁰
d)
30⁰
62.
Convert 3π/4 to degrees
a)
147.3°
b)
135°
c)
125°
d)
173.8°
63.

The movement of a body or body part in a circular path about an axis of rotation can be described as:

a)

Angular Motion

b)

Angular Velocity

c)

Moment of Inertia

d)

Torque

64.

The unit of angular velocity is

a)

m/s

b)

m/s²

c)

rad/s

d)

rad/s²

65.

An object is moving with uniform speed in a horizontal, counterclockwise circle. At location B, which way does the acceleration vector point?

a)

Left

b)

Right

c)

Up

d)

Down

66.

An object is moving with uniform speed in a horizontal, counterclockwise circle. At location A, which way does the velocity vector point?

a)

Left

b)

Right

c)

Up

d)

Down

67.

An object is moving with uniform speed in a horizontal, counterclockwise circle. At location D, which way does the centripetal force vector point?

a)

Left

b)

Right

c)

Up

d)

Down

68.

An object is moving with uniform speed in a counterclockwise, horizontal circle. Which of the following images correctly depicts the force vector and velocity vector at a point in time.

a)
b)
c)
d)
69.

An object moving is moving with uniform speed in a horizontal counterclockwise circle. At the location depicted, the centripetal force stops. Which path will the object follow?

a)
b)
c)
d)
e)
70.

Two students (A and B) are on a merry-go round (depicted). Which student has the greater period of revolution?

a)

A

b)

B

c)

Both are equal

d)

Cannot be determined

71.

Two students (A and B) are on a merry-go round (depicted). Which student has a greater tangential speed?

a)

A

b)

B

c)

Both are equal

d)

Cannot be determined

72.

Two students (A and B) are on a merry-go round (depicted). Which student has a greater centripetal acceleration?

a)

A

b)

B

c)

Both are equal

d)

Cannot be determined

73.

A racecar is driving with a constant speed around a track (depicted). At what location will the car have the greater centripetal force acting on it?

a)

A

b)

C

c)

D

d)

F

74.

A racecar is driving with a constant speed around a track (depicted). At what location will the car have the least centripetal force acting on it?

a)

b

b)

C

c)

D

d)

F

75.

A test car moves at a constant speed around a circular track. If the car is 75.0 m from the track’s center and has a centripetal acceleration of 19.6 m/s2, what is the tangential speed?

a)

1470 m/s

b)

3.83

c)

38.3

d)

19.6

76.

A student sits on a merry-go-round that has a period of revolution of 45.0 seconds. If the student is on a carousel horse that is 4.50 meters from the center, what is the student’s centripetal acceleration?

a)

9.80 m/s2

b)

1.23 m/s2

c)

0.0532 m/s2

d)

0.0876 m/s2

77.

A truck (m = 3500 kg) drives around a curve in the road (r = 20.0 m) with a constant speed of 12.0 m/s. Determine the centripetal force acting on the truck.

a)

34300 N

b)

70000 N

c)

25200 N

d)

5830 N

78.

A fighter pilot (m = 90.0 kg) flies through a vertical loop (r = 9500 m) at a speed of 285 m/s. Determine the centripetal force acting on the pilot.

a)

770 N

b)

882 N

c)

25700 N

d)

8.55 N

79.

A second fighter pilot (m = 90.0 kg) flies through a vertical loop (r = 5500 m) at a speed of 285 m/s. Determine the range of G-force acting on the pilot.

a)

0-1 G's

b)

1-3 G's

c)

3-6 G's

d)

>6 G's

80.

A roller coaster ( m = 1000 kg) travels through the bottom of a vertical loop (r = 10.0 m) with a speed of 16.0 m/s. Determine the magnitude of the normal force acting on the roller coaster.

a)

9800 N

b)

15500 N

c)

25600 N

d)

35400 N

81.

A roller coaster ( m = 1000 kg) travels through the top of a vertical loop (r = 15.0 m) with a speed of 13.0 m/s. Determine the magnitude of the normal force acting on the roller coaster.

a)

9800 N

b)

1470 N

c)

5340 N

d)

35400 N

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