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PS Unit 4 Review B

Total questions: 112

Worksheet time: 1hrs 1mins

Name
Class
Date
1.

What is the car's initial position (xi)?

a)

15m

b)

0m

c)

-15m

d)

-5m

2.

What is the car's final position (xf)?

a)

15m

b)

0m

c)

-15m

d)

-5m

3.

What is the car's change in position Δx\Delta x  ?

a)

15m

b)

0m

c)

-15m

d)

-5m

4.

What is the car's distance travelled?

a)

15m

b)

0m

c)

-15m

d)

-5m

5.

Charles and Max plan to make dinner at Max's house. Max leaves his house and drives to the grocery store. What is Max's position at the grocery store?

(a)  

6.

Charles and Max plan to make dinner at Max's house. Max leaves his house and drives to the grocery store. When Max drives from his house to the grocery store, what is his change in position?

(a)  

7.

Charles and Max plan to make dinner at Max's house. Max leaves his house and drives to the grocery store. When Charles drives to Max's house, what is his change in position?

(a)  

8.

Charles and Max plan to make dinner at Max's house. Max leaves his house and drives to the grocery store. What is the distance between Charles' house and Max's house?

(a)  

9.

Position is always relative to a fixed (zero) point.

a)

True

b)

False

10.

Distance can be positive, negative, or zero.

a)

True

b)

False

11.

Here is a position-time graph of the motion of three bubble tubes. Which bubble moved the fastest?

a)

RED

b)

BLUE

c)

PURPLE

d)

They all moved at the same rate.

12.

Here is a position-time graph of the motion of three bubble tubes. Which bubble moved with a constant speed?

a)

RED

b)

BLUE

c)

PURPLE

d)

They all moved at a constant rate.

13.

The graph shows a position-time graph for two bikers. Which biker moved the fastest?

a)

Biker A

b)

Biker B

c)

Both moved at the same speed.

14.

Calculate the speed of this object using the formula. Enter the number value only - units are m/s. v = xf − xitf − tiv\ =\ \frac{x_{f\ }-\ x_i}{t_{f\ }-\ t_i}  

(a)  

15.

The slope of a line on a position - time graph tells you (a)   .

16.

(a)   tells both speed and direction.

17.

What does the following formula describe?

total dist.total time\frac{total\ dist.}{total\ time}  

a)

speed

b)

position

c)

average speed

d)

displacement

18.

Charles takes a bike ride. He goes 2 mi in 20 minutes, stops for 15 minutes to rest, then rides back 2 miles in 25 minutes. What is his average speed in miles/hour? (Enter the number value only - units are mi/hr).

(a)  

19.

Describe the motion of a car represented by the graph.

a)

it is moving at a constant slow speed

b)

it is speeding up

c)

it is not moving

d)

it's moving at a constant medium speed

20.

Which of the following are true about the car and the truck shown in the graph?

a)

The car is moving faster than the truck.

b)

The truck is moving faster than the car.

c)

They are moving in opposite directions.

d)

They are moving at the same speed.

21.

The rate at which velocity changes.

a)

velocity

b)

position

c)

acceleration

d)

free fall

22.

The movement of an object toward Earth solely because of gravity

(a)  

23.

Acceleration near Earth's surface is

a)

9.8 m/s2

b)

unknown

c)

dependent on the weight of the object

d)

dependent on the height the object falls from

24.

You can accelerate even if your speed is constant.

a)

True

b)

False

25.

Motion is described with respect to a

a)

graph

b)

displacement

c)

slope

d)

frame of reference

26.

Displacement is distance combined with

a)

direction

b)

speed

c)

velocity

d)

magnitude

27.

Displacement vectors of 3m and 5m in the same direction combine to make a displacement vector that is

a)

2m

b)

0m

c)

8m

d)

15m

28.

Average speed is the total distance divided by the

a)

average distance

b)

average acceleration

c)

total time

d)

slope

29.

The slope of a position-time graph is equal to the

a)

velocity

b)

displacement

c)

acceleration

d)

motion

30.

Velocity is

a)

the slope of a linear graph

b)

acceleration divided by displacement

c)

speed with direction

d)

the same in all reference frames

31.

Two or more velocities can be combined by

a)

graphing the slope

b)

using vector addition

c)

calculating the instantaneous velocity

d)

determining the rate

32.

A ball just dropped is an example of

a)

constant speed

b)

instantaneous velocity

c)

combining displacements

d)

free fall

33.

Jamie jogs each morning before work. She starts at 7:00 am and jogs 1 mile to the park and 1 mile back to her apartment. It takes her 24 minutes to complete her workout. What is her displacement during each of her morning jogs?

a)

2 miles

b)

24 minutes

c)

0 miles

d)

12 min / mile

34.

Movement in relation to a frame of reference is called

a)

instantaneous speed

b)

average speed

c)

relative motion

d)

displacement

35.

Hannah biked 12 miles in 1 hour, 10 miles the next hour, and 20 miles the next 2 hours. What was her average speed?

a)

12 mi/hr

b)

10.5 mi/hr

c)

14 mi/hr

d)

10.7 mi/hr

36.

The line on this position-time graph indicates that the object is

a)

speeding up

b)

slowing down

c)

moving at a constant speed

d)

not moving

37.

The rate at which velocity changes is called

(a)  

38.

Which of the following answers is an example of an object that is accelerating (there may be more than one answer)

a)

A ball falling from a height

b)

A person jogging on a treadmill at 3 mi/hr.

c)

A ball moving at a constant speed in a straight line

d)

A person riding a motorcycle at a constant speed in a circle

39.

Which of the following is NOT true about an object in free fall?

a)

it speeds up as it falls

b)

it accelerates at -9.8 m/s2

c)

it has constant acceleration

d)

it has constant velocity

40.

What does the slope of a velocity-time graph tell you?

a)

velocity

b)

displacement

c)

acceleration

d)

position

41.

Which of the following is NOT acceleration?

a)

speeding up

b)

slowing down

c)

changing direction

d)

standing still

42.

How fast a velocity is changing at a specific instant is called

a)

instantaneous velocity

b)

instantaneous speed

c)

instantaneous acceleration

d)

linear

acceleration

43.

Velocity means both speed and _____.

a)

direction

b)

acceleration

c)

position

d)

distance

44.

Define motion.

a)

Rate of motion measured in distance over a period of time.

b)

A change in velocity over a certain amount of time. Can be positive or negative.

c)

A change in position relative to a frame of reference.

d)

Quantities that are fully described by both a magnitude and a direction.

45.

What is required for an object to start moving, stop moving, speed up, slow down, or change directions?

(a)  

46.

The sum of all the forces acting on an object.

(a)  

47.

When forces are balanced, it means that net force =

(a)  

48.

Unbalanced forces acting on an object cause the object to

a)

move

b)

stop

c)

accelerate

d)

stay at rest

49.

When the net force acting on an object is zero, the object will

a)

stop moving

b)

speed up

c)

not accelerate

d)

slow down

50.

Which of the following is NOT one of the four main types of friction?

a)

rolling friction

b)

static friction

c)

fluid friction

d)

sliding friction

e)

standing friction

51.

The constant velocity of a falling object when the force of air resistance equals the force of gravity.

(a)  

52.

A falling object's motion after it is given a forward velocity. (also known as 2D motion)

(a)  

53.

Which is true of an object dropped vs. an object thrown horizontally at the same time?

a)

the object dropped will reach the ground first

b)

the object thrown forward will reach the ground first

c)

they will reach the ground at the same time

d)

only the object dropped is in free fall

54.

A force that acts between any two masses. It causes objects to accelerate downward.

(a)  

55.

A 10-kg brick and a 1-kg brick are dropped in a vacuum. The force of gravity on the 10-kg brick is

a)

the same as the force on the 1-kg brick

b)

10 times as much

c)

1/10 as much

d)

zero

56.

An object is propelled along a straight-line path in space by a force. If the object sweeps up extra particles and its mass becomes twice as much, its acceleration

a)

quadruples

b)

doubles

c)

stays the same

d)

halves

57.

A 10-N falling object encounters 10-N of air resistance. The net force on the object is...

a)

0 N

b)

4 N

c)

6 N

d)

10 N

58.

An apple weighs 1 N. When held at rest above your head, what is the net force on the apple?

(a)  

59.

When the net force on an object is zero, the acceleration of the object is

a)

constant

b)

zero

c)

less than zero

d)

more than zero

60.

An object following a straight-line path at constant speed has

a)

a net force acting on it in the direction of motion

b)

zero acceleration

c)

no forces acting on it

d)

constant acceleration

61.

What is the weight of a 100-kg object if g= 9.8 N/kg?

Fg = m × gF_{g\ }=\ m\ \times\ g  

a)

100 N

b)

9.8 N

c)

98 N

d)

980 N

62.

What is the mass of an object that weighs 44.1 N if g = 9.8 N/kg?

(in kg - don't include units).

Fg = m × gF_{g\ }=\ m\ \times\ g  

(a)  

63.

If an object has a mass of 300 kg and accelerates at 1.5 m/s2, what is the net force acting on the object? (in N, don't include units in your answer).

F = m × aF\ =\ m\ \times\ a  

(a)  

64.

A boy pulls a 20-kg wagon with a constant force of 44 N. What is the acceleration of the wagon in m/s2? (don't include units in your answer).

F = m × aF\ =\ m\ \times\ a  

(a)  

65.

A large boy and a small girl run into each other in the hallway. Which one experiences the greatest amount of force?

a)

the small girl

b)

the large boy

c)

the forces are the same

66.

A baseball bat exerts a force of 1000 N on a baseball. The force that the ball exerts on the bat is

a)

less than 1000 N

b)

more than 1000 N

c)

exactly 1000 N

d)

0 N

67.

Newton's third law states that action-reaction forces are equal in magnitude and (a)   in direction.

68.

Which of the following is NOT true of Newton's third law of motion?

a)

All forces occur in pairs.

b)

Force pairs are equal in magnitude and opposite in direction

c)

Force pairs act on two different objects.

d)

Force pairs always act on the same object.

69.

The product of an object's mass and it's velocity.

m × vm\ \times\ v  

(a)  

70.

What is the momentum of a golf ball if it weighs 0.05 kg and is moving at a velocity of 60 m/s? 

a)

20 kg⋅mskg\cdot\frac{m}{s}  

b)

1200 kg⋅mskg\cdot\frac{m}{s}  

c)

3 kg⋅mskg\cdot\frac{m}{s}  

d)

60 kg⋅mskg\cdot\frac{m}{s}  

71.

In a closed system, the amount of momentum before a collision is _____ the amount of momentum after a collision.

a)

equal to

b)

greater than

c)

less than

72.

States that if no net force acts on a system, then the total momentum of the system does not change.

a)

law of conservation of mass

b)

law of conservation of energy

c)

law of conservation of momentum

d)

law of conservation of velocity

73.

The force associated with charged particles

a)

electromagnetic force

b)

strong nuclear force

c)

gravitational force

d)

weak nuclear force

74.

Like charges repel, and opposite charges (a)   .

75.

A powerful force of attraction that acts only on the neutrons and protons in the nucleus of an atom, holding them together.

a)

strong nuclear force

b)

weak nuclear

force

c)

gravitational

force

d)

electromagnetic force

76.

Which is the weakest universal force?

a)

gravitational

force

b)

strong nuclear force

c)

weak nuclear

force

d)

electromagnetic force

77.

An attractive force that acts between any two masses.

a)

electromagnetic force

b)

gravitational

force

c)

strong nuclear force

d)

weak nuclear

force

78.

What factors affect gravitational force?

a)

mass and distance

b)

velocity and mass

c)

distance and time

d)

mass and volume

79.

You tie a rock to a string and whirl it in a circle above your head. The force the string exerts on the rock is called (a)   force.

80.

Which universal force can repel as well as attract?

(a)  

81.

What force is responsible for the orbits of the planets in the solar system?

(a)  

82.

Newton's law of universal gravitation states that every object in the universe attracts every other object.

a)

true

b)

false

83.

In order to calculate pressure exerted on a surface, what quantity is divided by the surface area?

a)

altitude

b)

force

c)

mass

d)

volume

84.

The SI unit of pressure is the

(a)  

85.

If the air inside a balloon exerts a force of 2N on an area of 0.5 m2, what is the pressure inside the balloon?

a)

2 N/m2

b)

4 N/m2

c)

1 N/m2

d)

0.25 N/m2

86.

A pressure of 70 N/m2 equals

a)

7 Pa

b)

70 Pa

c)

700 Pa

d)

7000 Pa

87.

A substance that assumes the shape of its container.

(a)  

88.

As altitude increases, air pressure (a)   .

89.

Which of the following is NOT a fluid?

a)

oxygen

b)

ice

c)

water

d)

oil

90.

Atmospheric pressure is caused by

a)

air currents

b)

the weight of the atmosphere above a particular location

c)

clouds

d)

altitude above sea level

91.

The pressure of air at sea level is approximately

a)

0 kPa

b)

10 kPa

c)

101 kPa

d)

1000 kPa

92.

Where would fluid pressure be the greatest in a swimming pool?

a)

30 cm below the surface

b)

1 m below the surface

c)

2 m below the surface

d)

the pressure is the same at all depths

93.

Which principle states that a change in the pressure at any point in a fluid in a closed container is transmitted equally and unchanged in all directions throughout the fluid?

a)

Archimedes' principle

b)

Bernoulli's

principle

c)

Newton's

principle

d)

Pascal's

principle

94.

The SI unit of pressure is

a)

Newton

b)

square meter

c)

Pascal

d)

Bernoulli

95.

The operation of a hydraulic lift system is explained by

a)

Archimedes' principle

b)

Bernoulli's

principle

c)

Newton's

principle

d)

Pascal's

principle

96.

The hydraulic lift system of a dump truck is designed to multiply

a)

distance

b)

force

c)

pressure

d)

speed

97.

As the speed of a fluid increases, the pressure within the fluid decreases.

a)

Archimedes' principle

b)

Bernoulli's

principle

c)

Newton's

principle

d)

Pascal's

principle

98.

The upward force acting on the wind of an airplane in flight.

(a)  

99.

Which of the following statements is true about an airplane wing during flight?

a)

air above the wing travels faster than air below the wing

b)

air below the wing travels faster than air above the wing

c)

the wing exerts pressure equally in all directions

d)

the lift acting on the wing reduces the weight of the wing

100.

Wings are sometimes used to create a downward force.

a)

true

b)

false

101.

In a hydraulic lift system, an increased output force is produced because a constant fluid pressure is exerted on the larger area of the output piston.

a)

true

b)

false

102.

T or F: The faster an airplane moves, the more lift the wings create.

a)

True

b)

False

103.

The upward force acting on an object submerged in a fluid is called

a)

buoyant force

b)

drag

c)

pressure

d)

weight

104.

A brick weighs 26N. Measured underwater, it weighs 11N. What is the size of the buoyant force exerted by the water on the brick?

a)

37N

b)

26N

c)

11N

d)

15N

105.

The strength of the buoyant force acting on an object in a fluid depends on the object's

a)

mass

b)

surface area

c)

volume

d)

weight

106.

The buoyant force on an object in a fluid is equal to the weight of the

a)

fluid

b)

fluid surrounding the object

c)

fluid displaced by the object

d)

object

107.

The relationship between buoyant force and weight of a displaced fluid was first stated by

a)

Archimedes

b)

Bernoulli

c)

Newton

d)

Pascal

108.

Why does a hot air balloon float?

a)

the shape of the balloon provides lift

b)

the volume of air displaced by the balloon is less than the volume of the balloon

c)

the weight of the air displaced by the balloon is less than the volume of the balloon

d)

the weight of the balloon is less than the weight of the air displaced by the balloon

109.

Which of the following substances will float in corn syrup? (The density of corn syrup is 1.38 g/cm3)

a)

copper

8.9 g/cm3

b)

silver

10.5 g/cm3

c)

iron

7.8 g/cm3

d)

glycerin

1.26 g/cm3

110.

A submerged submarine alters its (a)   to rise or fall in the water.

111.

The direction of the buoyant force on an object placed in a fluid is (a)   .

112.

The unit g/cm3 is often used to express (a)   .

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