Free Printable Unit 5

1.

When is the potential energy the greatest in a roller coaster?

a)

a. at the bottom of the first hill

b)

b. at the top of the first hill

c)

c. at the top of the second hill

d)

d. at the bottom of the second hill

2.

When you eat fruits and vegetables, chemical bonds are releasing stored energy, this is...

a)

a. thermal energy

b)

b. sound energy

c)

c. electrical energy

d)

d. chemical energy

3.

Any time an energy conversion takes place, some of the original energy is converted to which one of the following?

a)

a. sound energy

b)

b. potential energy

c)

c. light energy

d)

d. thermal energy

4.

Which of the following is a conversion from light energy to chemical energy?

a)

a. turning on a stove to heat dinner

b)

b. turning on a lamp

c)

c. growing an apple tree

d)

d. making toast in a toaster

5.

After an energy conversion, you end up with the same total amount of energy as the original amount of potential energy. Which of the following laws explains this rule?

a)

a. law of energy changes

b)

b. law of conservation of energy

c)

c. law of power and energy

d)

d. law of potential energy

6.

The ability to do work

a)

A. chemical energy

b)

B. Friction

c)

C. electrical energy

d)

D. Energy

7.

a. Energy stored in the nucleus of an atom.

a)

A. Sound Energy

b)

B. Potential Energy

c)

C. Nuclear Energy

d)

D. Thermal energy

8.

The energy of moving electrons

a)

A. Energy

b)

B. Energy Conversion

c)

C. Chemical Energy

d)

D. Electrical Energy

9.

Where is the potential energy the greatest?

a)

A

b)

B

c)

C

d)

D

10.

Energy from light waves.

a)

Radiant Energy

b)

Chemical Energy

c)

Nuclear Energy

d)

Radiation

11.

A student is holding the end of a pendulum. The student releases the pendulum. What energy transfers are taking place?

a)

potential energy is transferred to kinetic energy

b)

chemical energy to thermal energy

c)

mechanical energy to chemical energy

d)

kinetic energy is tranferred to potential energy

12.

The Gulf Stream is a current that brings warm ocean water from the south to the north.

a)

conduction

b)

convection

c)

radiation

13.

Walking on the warm sand sand with your bare feet.

a)

conduction

b)

convection

c)

radiation

14.

Which direction will the heat flow while this person holds a hot cup of tea?

a)

from the cup to her hand

b)

from her hand to the cup

c)

no heat is transferred

15.

Which direction will the heat flow while this ice cap melts?

a)

there is no heat transfer

b)

from the icecap to the water

c)

from the water to the icecap

16.

In this experiment, the WARM red dye and the COLD blue dye was placed in the water at the same time. The warm red dye rose to the top while the cold blue dye sank to the bottom.

a)

conduction

b)

convection

c)

radiation

17.

Heat transfers from an area of ____temperature to an area of ___ temperature.

a)

high to low

b)

low to high

c)

high to high

18.

High temperature is connected to:

a)

Low kinetic energy.

b)

High kinetic energy.

c)

Zero net energy.

d)

Equal kinetic energies.

19.

What is thermodynamics?

a)

movement of heat

b)

it's magic

c)

measurement of heat

d)

none of them

20.

Energy due to motion is ____________ energy.

a)

Potential

b)

Energy

c)

Kinetic

d)

Friction

21.

Potential or kinetic?
Stretched bow and arrow?

a)

kinetic

b)

potential

22.

At which point(s) on the roller coaster is the gravitational potential energy at its maximum?

a)

A

b)

B

c)

C

d)

D

23.

At which point(s) on the roller coaster is the kinetic energy at its maximum?

a)

A

b)

B

c)

C

d)

D

24.

Select all: Work is equal to...

a)

KE + PE

b)

Change in energy

c)

mg

d)

Fd

25.

What is the difference between calculating power and work?

a)

Power takes into account the time it takes to complete a task

b)

Work takes into account the time it takes to complete a task

c)

Power is force/area

d)

Work is force/area

26.

Gravitational potential energy depends on the ________ and ________ of the object.

a)

Height and mass

b)

Friction and movement

c)

Mass and Movement

d)

Height and Friction

27.

If an object moves from a high place to a lower place, will it gain or lose potential energy?

a)

lose

b)

gain

c)

neither

d)

both

28.

Bobby lifts a book to the second floor in 20 seconds. Carol lifts the same book to the second floor in 10 seconds. Who did more work?

a)

Bobby

b)

Carol

c)

They did the same amount of work

d)

Not enough information

29.

A girl weighs 400 N. She runs up a flight of stairs of height 5 m in 4 seconds. Her power is:

a)

320 W

b)

400 W

c)

500 W

d)

2 000 W

30.

Groot rescues Rocket from the bottom of a deep pit. Groot expends 1000 J of energy lifting Rocket who has a mass of 50 kg out of the pit. How deep is the pit?

a)

0.5 m

b)

2 m

c)

4 m

d)

10 m

31.

What has to happen when a force is exerted on an object for work to be done?

a)

the object moves

b)

the object stays still

c)

the object is heavy

d)

none of these

32.

What is kinetic energy?

a)

stored energy

b)

energy of motion

c)

energy of friction

d)

energy stored in chemical bonds

33.

How do we express the total amount of energy a moving object has?

a)

KE x PE

b)

KE + PE

c)

KE - PE

d)

KE / PE

34.

What type of energy represents the sum of the KE and PE that a moving object has?

a)

chemical energy

b)

total mechanical energy

c)

electromagnetic energy

d)

electrical energy

35.

When a roller coaster cart falls towards the ground, what happens to its potential energy?

a)

Increases

b)

Decreases

c)

Stays the same

d)

Nothing

36.

When a rollercoaster cart moves towards the ground, what happens to the PE that it has?

a)

It transforms into KE

b)

It leaves the system

c)

Nothing

d)

It stays PE

37.

What is the kinetic energy of a ball sitting on top of a hill?

a)

0 J

b)

less than 0 J

c)

more than 0 J

38.

The Law of Conservation of Energy states that total amount of energy in a closed system will always

a)

stay the same

b)

increase

c)

decrease

d)

cannot be determined

39.

Based on the formula for potential energy, what 2 variables influence PE the most?

a)

mass and height

b)

mass and velocity

c)

velocity and height

d)

velocity and mass

40.

In order for work to be done, what must be true?

a)

Force acts in the same direction as the distance traveled.

b)

Force and distance are in opposite directions.

c)

Force is greater than distance.

d)

Distance is greater than force.

41.

When you carry an object, is work done on it?

a)

Yes, force is applied in the same direction as the distance it travels.

b)

No, force is applied in a different direction than distance traveled.

42.

In which situation is NO work done?

a)

picking up a book bag

b)

dropping the bookbag

c)

carrying the bookbag

d)

none of these

43.

What is being transferred as you do work?

a)

Energy

b)

Heat

c)

Power

d)

Gravitational Potential Energy

44.

How do we calculate work?

a)

W = F * d

b)

w = f * D

c)

W = F * D

d)

w = f * d

45.

How do you calculate power?

a)

P = W/t

b)

P = E/t

c)

P = w * t

d)

P = bbq/chicken

46.

The SI unit of work is?

a)

Joules

b)

Watts

c)

Newtons

d)

meters

47.

What is the formula for Gravitational Potential Energy?

a)

PE = m*g*h

b)

KE = 1/2m*v2

c)

W = F*d

d)

P = W/t

48.

What is the formula for Kinetic Energy?

a)

PE = m*g*h

b)

KE = 1/2m*v2

c)

W = F*d

d)

P = W/t

49.

A 5000N block is lifted 10 m. How much work was done?

a)

50000 J

b)

5000 J

c)

500 J

d)

50 J

50.

If 150 Joules of work is needed to move a box 10 meters, what force was used?

a)

1500 N

b)

15 N

c)

1.5 N

d)

150 N

51.

A person carries a 2.50-N pebble through the path shown in the figure, starting at point A and ending at point B. The total time from A to B is 405s. How much work did gravity do on the rock between A and B?

a)

45 J

b)

-45 J

c)

37.5 J

d)

-37.5 J

52.

A person carries a 2.50-N pebble through the path shown in the figure, starting at point A and ending at point B. The total time from A to B is 405s. How much work did the person do on the rock between A and B?

a)

45 J

b)

-45 J

c)

37.5 J

d)

-37.5 J

53.

Linda does four times as much work as James does and in one-third the time. Linda’s power output is ________.

a)

four times James’ power output

b)

the same as James’ power output

c)

twelve times James’ power output

d)

cannot be determined

54.

Work is ____.

a)

a scalar

b)

a vector

c)

neither a scalar nor vector

d)

both a scalar and vector

55.

What is the kinetic energy of a 50 N boulder resting at the top of a 25 m cliff?

a)

1250 J

b)

625 J

c)

0 J

d)

12500 J

56.

Two objects, one of mass m and the other of mass 2m, are dropped from the top of a building. If there is no air resistance, when they hit the ground _______.

a)

the heavier one will have half the kinetic energy of the lighter one

b)

the heavier one will have twice the kinetic energy of the lighter one

c)

the heavier one will have one-fourth the kinetic energy of the lighter one

d)

the heavier one will have four times the kinetic energy of the lighter one

57.

Three cars (car A, car B, and car C) are moving with the same speed when the drivers slam on their brakes. The most massive car is car A, and the least massive is car C. If the tires of all three cars have identical coefficients of kinetic friction with the road surface, for which car is the amount of work done by friction in stopping it the greatest?

a)

The amount of work done by friction is the same for all cars.

b)

Car A

c)

Car B

d)

Car C

58.

The graph plots velocity against time. During which interval is no work done?

a)

Between A & B

b)

Between B & C

c)

Between C & D

d)

Between D & E

59.

The graph plots velocity against time. What feature of the graph shows negative work?

a)

Velocity increases

b)

Velocity remains constant

c)

Velocity decreases

d)

Cannot be determined

60.

Constant velocity implies

a)

a = 0 m/s²

b)

Fnet = 0 N

c)

Balanced forces

d)

W = 0 J

e)

All of the above

61.

A closed system ____.

a)

conserves mechanical energy

b)

conserves potential energy

c)

conserves kinetic energy

d)

does not conserve energy

62.

Energy transferred out of a system is typically transferred via ____.

a)

tension force

b)

friction force

c)

spring force

d)

gravitational force

63.

Which is not a type of potential energy?

a)

Chemical energy

b)

Gravitational energy

c)

Elastic energy

d)

Thermal energy

64.

Which quantity is not integral for calculating mechanical energy?

a)

force

b)

height

c)

mass

d)

velocity

e)

acceleration

65.

A ball is tossed straight up and later returns to the point from which it was launched. If the ball is subject to air resistance as well as gravity, which of the following statements is correct?

a)

The speed at which the ball returns to the point of launch is less than its speed when it was initially launched.

b)

The time for the ball to fall is the same as the time for the ball to rise.

c)

The force of air resistance is directed down-ward both when the ball is rising and when it is falling.

d)

The net work done by air resistance on the ball during its flight is zero.

e)

The net work done by gravity on the ball during its flight is greater than zero.

66.

An amusement park ride has two identical carriages that revolve around the center of the ride’s axle, as shown in the figure. Both carts travel at a constant tangential speed at all points along the circular path. At what position is the total mechanical energy of the cart-cart-Earth system at its maximum value?

a)

b)

c)

d)

The total energy of the Earth-ferris wheel ride is constant

67.

What is Newton's first law?

a)

For every action, there is an equal and opposite reaction.

b)

An object in motion or at rest will stay in motion or at rest until acted upon.

c)

F=ma

d)

Something about penguins.

68.

What are the units for Work?

a)

Newtons

b)

Kilograms

c)

Joules

d)

Moles

69.

What is the equation for Work?

a)

W = Fd

b)

W = md

c)

W = Fa

d)

W = mv

70.

If you had a force (F) of 20N pushing a ball 2 meter (m), what would be the Work (W) being done?

a)

10 Joules

b)

40 Joules

c)

22 Joules

d)

18 Joules

71.

What is the equation for Kinetic Energy (KE)?

a)

$KE\ =\ 2mv^2$

b)

$KE\ =\ 2mv$

c)

$KE\ =\ mv^2$

d)

KE\ =\ \frac{1}{2}mv^2

72.

Work can also be shown as

W\ =\ \Delta KE

How do you find

\Delta KE

?

a)

$KE_i\ -\ KE_f$

b)

$KE_f\ -\ KE_i$

c)

$KE\ +\ KPOP\ =\ BbyMtl$

d)

$42?$

73.

The faster an object moves, the ________ kinetic energy it has.

a)

more

b)

less

c)

none of the above

d)

all of the above

74.

Which is the best example that something has kinetic energy?

a)

a. a car parked on a steep hill

b)

b. a tennis ball rolling across the court

c)

c. a picture hanging on the wall

d)

d. a piece of coal before it's burned

75.

At which point on the roller coaster is the gravitational potential energy the greatest?

a)

W

b)

X

c)

Y

d)

Z

76.

What is the gravitational potential energy of an 85 kg mountain climber at the summit of a 6267 m volcano?

Let g = 9.8m/s²

a)

5,220,411 J

b)

532,695 J

c)

73.7 J

d)

54,356.6 J

77.

You drop a 5 kg ball from a height of 2 m. Just before it reaches the ground, what is the ball's kinetic energy?

a)

980 J

b)

10 J

c)

0.98 N

d)

980 N

78.

What is the unit used to measure work?

a)

Joule

b)

Watt

c)

Newton

d)

Pascal

79.

When work is done, there is always a(n) _______.

a)

constant rate

b)

single movement involved

c)

transfer of energy

d)

increase in the mechanical advantage

80.

At which point(s) on the roller coaster is the kinetic energy at its maximum?

a)

A

b)

B

c)

C

d)

D

81.

Work is defined as applying a force on an object that displaces the object in the direction of the applied force. Which of the following IS NOT an an example of work being done on an object?

a)

A waiter walking with a tray of food that he is holding with his hand under the tray.

b)

A horse pulling a plow through a field.

c)

A shopper pushing a cart down the aisle of a grocery sture.

d)

A weightlifter lifting a barbell above his head.

82.

Which of the following is an instance of negative Work?

a)

A car skidding to a stop on a roadway surface.

b)

A student rolling a bowling ball down a bowling lane alley.

c)

A pitcher throwing a baseball.

d)

a man pushing a crate across a loading dock.

83.

Is this an example of work?

a)

Yes

b)

No

84.

Force is measured in...

a)

Kilograms

b)

m/s

c)

Newtons

d)

Joules

85.

Which person is doing more work?

a)

Left

b)

Right

c)

Both

d)

Neither; they are doing the same amount of work.

86.

Which person uses the greatest force on the barrel?

a)

Right

b)

Left

c)

Both

d)

Neither; they are doing the same amount of work.

87.

What is the GPE at point A

a)

14 J

b)

12 J

c)

6 J

d)

8 J

88.

What is the KE at point B?

a)

14 J

b)

12 J

c)

6 J

d)

8 J

89.

What is the Total Energy of the system?

a)

14 J

b)

12 J

c)

6 J

d)

8 J

90.

What is the KE at point D?

a)

14 J

b)

12 J

c)

6 J

d)

8 J

91.

What is the GPE at point E?

a)

14 J

b)

12 J

c)

6 J

d)

8 J

92.

What is the Total Mechanical Energy at point A?

a)

500,000 J

b)

400,000 J

c)

200,000 J

d)

50,000 J

93.

What is the Kinetic Energy at point B?

a)

500,000 J

b)

400,000 J

c)

300,000 J

d)

50,000 J

94.

What is the Kinetic Energy at point C?

a)

500,000 J

b)

400,000 J

c)

300,000 J

d)

50,000 J

95.

What is the Kinetic Energy at point D?

a)

500,000 J

b)

250,000 J

c)

300,000 J

d)

50,000 J

96.

What is the GPE at point E?

a)

500,000 J

b)

250,000 J

c)

300,000 J

d)

100,000 J

97.

What is the GPE at point F?

a)

500,000 J

b)

250,000 J

c)

300,000 J

d)

0 J

98.

What is the KE at point F?

a)

500,000 J

b)

250,000 J

c)

300,000 J

d)

0 J

99.

What is the Total Energy at the top?

a)

15,000 J

b)

3,750 J

c)

7,500 J

d)

11,250 J

100.

What is the KE 1/4th of the way down?

a)

15,000 J

b)

3,750 J

c)

7,500 J

d)

11,250 J

101.

What is the KE 1/2 of the way down?

a)

15,000 J

b)

3,750 J

c)

7,500 J

d)

11,250 J

102.

What is the KE 3/4th of the way down?

a)

15,000 J

b)

3,750 J

c)

7,500 J

d)

11,250 J

103.

What is the KE at the bottom?

a)

15,000 J

b)

3,750 J

c)

7,500 J

d)

11,250 J

104.

What is the GPE at the top?

a)

50 J

b)

25 J

c)

0 J

d)

100 J

105.

What is the KE half way down?

a)

50 J

b)

25 J

c)

0 J

d)

100 J

106.

What is the Total Energy at the bottom?

a)

50 J

b)

25 J

c)

0 J

d)

100 J

107.

What is not a true statement about energy?

a)

Energy cannot be destroyed

b)

Energy is created in a form heat and mechanical energy

c)

Energy cannot be created

d)

Energy can only be transform from one form to another

108.

What are the types of energy? (Select the ones that apply)

a)

Elastic Energy

b)

Potential

Energy

c)

Kinetic Energy

d)

Body Energy

109.

What is the formula of Mechanical Energy?

a)

1/2mv^2

b)

m*g*h

c)

2+3x

d)

1/2mv^2 + m*g*h

110.

What is the formula of KE?

a)

1/2mv²

b)

m*g*h

c)

x+5x²

d)

0.5*m*g*h

111.

What is the formula for PE?

a)

1/2mv²

b)

m*g*h

c)

9.8 0.5g

d)

x+4x

112.

What is the acceleration of gravity (g)?

(a)

113.

There are three shelves in a closet. The first one is 1.5 meters above the floor, the second shelf is 2.0 meters above the floor, and the third shelf is 2.5 meters above the floor.

A 10 kg box rests on the first shelf. How much gravitational potential energy does the box have relative to the second shelf?

a)

50 J

b)

100 J

c)

150 J

d)

200 J

114.

There are three shelves in a closet. The first one is 1.5 meters above the floor, the second shelf is 2.0 meters above the floor, and the third shelf is 2.5 meters above the floor.

The box is lifted to the third shelf. How much gravitational potential energy does the box have relative to the first shelf?

a)

100 J

b)

50 J

c)

-50 J

d)

150 J

115.

A roller coaster uses a motor to take a car to the top of its first hill. The roller coaster then travels down a 35 meter hill and to the top of the next hill. It travels with a speed of 15 m/s at the top of the second hill.

How high is the second hill? Assume no energy is lost to friction and the coaster starts from rest at the top of the first hill.

a)

12.5 m

b)

24 m

c)

34 m

d)

This cannot be determined without the mass of the car.

116.

In July 1971, Apollo 15 astronaut Dave Scott performed an experiment on the Moon. Scott held a feather and a hammer at the same height, and let them drop at exactly the same time. Both fell at the same rate and hit the ground at the same time.

At which time did the feather have the greatest kinetic energy?

a)

time 1

b)

time 2

c)

time 3

d)

both times 1 and 3

117.

In July 1971, Apollo 15 astronaut Dave Scott performed an experiment on the Moon. Scott held a feather and a hammer at the same height, and let them drop at exactly the same time. Both fell at the same rate and hit the ground at the same time.

At which time did the hammer have the greatest gravitational potential energy?

a)

time 1

b)

time 3

c)

times 1 and 3

d)

time 2

118.

In July 1971, Apollo 15 astronaut Dave Scott performed an experiment on the Moon. Scott held a feather and a hammer at the same height, and let them drop at exactly the same time. Both fell at the same rate and hit the ground at the same time.

Which of the following is true about the relationship between the gravitational potential energy and the kinetic energy of the hammer?

a)

The kinetic energy + gravitational potential energy stays the same at all times.

b)

The kinetic energy and potential energy are the same as each other at all times.

c)

The kinetic energy at time 1 is equal to the gravitational potential energy at time 1.

d)

The kinetic energy at time 3 is equal to the gravitational potential energy at time 3.

119.

An apartment building has two floors and a basement. The floors are 3.5 meters apart and the basement is 2.5 meters underground as shown.

A 100 kg man enters the apartment building at the ground floor and walks up to his second floor apartment. How much gravitational potential energy does he have relative to the ground? Use g = 10 m/s².

a)

350 J

b)

700 J

c)

3500 J

d)

7000 J

120.

An apartment building has two floors and a basement. The floors are 3.5 meters apart and the basement is 2.5 meters underground as shown.

The man’s 50 kg son is in the basement doing laundry. How much gravitational potential energy does the son have relative to his father on the second floor? Use g = 10 m/s².

a)

-3000 J

b)

-300 J

c)

300 J

d)

3000 J

121.

A crate slides down a 5-meter-long, 2-meter-high ramp as shown.

Alli places the 35 kg crate at an undesignated height and lets it slide to the bottom. Her lab partner measures the speed at the bottom of the ramp to be 5.5 m/s. Assuming the ramp is frictionless, at what height did Alli release the crate? Use g = 10 m/s².

a)

1.5 m

b)

2.0 m

c)

0.5 m

d)

1.0 m

122.

A temporary ladder can be used to escape from an upper story window in case of fire. The diagram shows a temporary ladder hanging from a second floor window and descending to a deck below. The ladder has 8 steps, each of which is 0.5 meters high. The surface of the deck is 1.0 meters above the ground.

A 10 kg cat is three steps below the window. What is its gravitational potential energy relative to the ground? Use g = 10 m/s².

a)

-350 J

b)

-150 J

c)

350 J

d)

150 J

123.

A temporary ladder can be used to escape from an upper story window in case of fire. The diagram shows a temporary ladder hanging from a second floor window and descending to a deck below. The ladder has 8 steps, each of which is 0.5 meters high. The surface of the deck is 1.0 meters above the ground.

A 50 kg dog is on the deck. What is its gravitational potential energy relative to the window? Use g = 10 m/s².

a)

-2000 J

b)

-500 J

c)

500 J

d)

2000 J

124.

A construction worker dropped a cement block from an undesignated height. The block had a speed of 30.0 m/s when it hit the ground. Assuming that no forces other than gravity acted on the block as it fell, from what height was the block dropped? Use g = 10 m/s².

a)

45 m

b)

90 m

c)

450 m

d)

The height cannot be calculated without knowing the mass.

125.

A 1,000-kg car is driving down the road at 5 m/s. The driver increases the speed of the car to 10 m/s. What is the correct amount of the increase in the kinetic energy of the car?

a)

12,500 J

b)

50,000 J

c)

37,500 J

d)

25,000 J

126.

The Great American Soapbox Derby is an annual summer event in Akron. Soapbox cars have no engines. They roll down the hill due to the force of gravity. Use the diagram of the derby car and track to answer the question. Assume no energy loss due to friction.

At which point will the kinetic energy be the same as the gravitational potential energy of the soapbox car as it rolls down the incline?

a)

point 1, because the car is highest

b)

point 3, because it is still moving down the ramp

c)

between points 2 and 3, when it is halfway down the ramp

d)

point 4, because it will have the greatest speed

Unit 5 - Energy

Total questions: 126

Worksheet time: 4hrs 45mins

Similar Resources on Wayground