Free Printable Kinetic and Potential Energy and Efficiency

1.

The process of energy changing from one form into another

a)

efficency

b)

law of conservation of energy

c)

energy transformation

d)

thermal energy

2.

Efficiency is...

a)

The percentage of energy that is actually used to do work

b)

The stuff in the walls that keeps energy in

3.

Food, gasoline, wood and batteries are all forms of ______________ energy

a)

Kinetic

b)

Nuclear

c)

Potential

d)

Fuel

4.

This energy comes from splitting Uranium atoms.

a)

Nuclear

b)

Petroleum

c)

Natural Gas

d)

Wind

5.

Which of the following energy transformations occur when a lamp that is plugged into a wall socket is functioning correctly?

a)

Chemical to light

b)

Electrical to chemical

c)

Electrical to light

d)

Chemical to electrical

6.

What kind of energy does an object possess when it's resting on top of the hill?

a)

Potential Energy

b)

Chemical Energy

c)

Kinetic Energy

d)

All of the above

7.

The first law of thermodynamics states that...

a)

Energy can created or destroyed but not transformed

b)

Energy cannot be created or destroyed, it can only transformed

c)

Energy can't be created, destroyed or transformed

d)

Energy cannot be created or destroyed.

8.

Holding a marble at the top of a ramp

a)

Potential

b)

Kinetic

9.

A slinky moving down a set of stairs

a)

Potential Energy

b)

Kinetic Energy

10.

A boy standing on top of a slide

a)

Potential Energy

b)

Kinetic Energy

11.

Dominos stand up on the floor

a)

Potential Energy

b)

Kinetic Energy

12.

A girl sliding down a slide

a)

Kinetic Energy

b)

Potential Energy

13.

Kinetic Energy is

a)

energy that matter has because of its position

b)

energy that matter has because of its motion

14.

At which point is potential energy greatest?

a)

W

b)

X

c)

Y

d)

Z

15.

__________ is stored energy.

a)

Potential

b)

Kinetic

c)

None of the above

d)

All of the above

16.

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

a)

more

b)

less

c)

none of the above

d)

same

17.

What kind of energy is in a moving skateboard?

a)

Potential

b)

Kinetic

c)

Both potential and kinetic energy

d)

none of the above

18.

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

19.

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

20.

What kind of energy is in a person climbing a ladder?

a)

Potential

b)

Kinetic

c)

Both

21.

When a pendulum swings, at which point is kinetic energy highest?

a)

1

b)

2

c)

3

d)

4

22.

A cheetah can run briefly with a speed of 31.0 m/s. Suppose a cheetah with a mass of 47.0 kg runs at this speed. What is the cheetah’s kinetic energy?

a)

1457 Joules

b)

22,584 Joules

c)

15 Joules

d)

45,167Joules

23.

What would have the greatest kinetic energy?

a)

A car driving down a hill.

b)

A person running down a hill.

c)

A ball rolling down a hill.

24.

The SI unit in which kinetic energy is measured is

a)

Newton

b)

Kilogram

c)

Joules

d)

Metres per second

25.

Calculate the kinetic energy of a moving 4 kg object travelling at a velocity of 3 m/s.

a)

18 J

b)

36 J

c)

12 J

d)

6 J

26.

How much kinetic energy does a moving 6 kg object have if it moves with a velocity of 3 m/s?

a)

27 J

b)

18 J

c)

9 J

d)

2 J

27.

What is the mass of a ball thrown at a velocity of 13 m/s with 338 J of kinetic energy?

a)

26 kg

b)

52 kg

c)

8 kg

d)

4 kg

28.

A ball with a mass of 5 kg rolls down the hill and has 250 J of kinetic energy. What is its speed?

a)

100 m/s

b)

1250 m/s

c)

10 m/s

d)

5 m/s

29.

A 60 kg Ewok is travelling at a constant speed and has 1470J of kinetic energy. What is its speed?

a)

7 m/s

b)

49 m/s

c)

30 m/s

d)

210 m/s

30.

What is the kinetic energy of a 1500 gram object moving at a velocity of 100 m/s

a)

112.5 J

b)

7,500,000 J

c)

75 J

d)

7,500 J

31.

What is the kinetic energy of a 25,000g object moving at a velocity of 2.5 m/s

a)

78.125 J

b)

31250 J

c)

781.25 J

d)

78,125 J

32.

Can energy be destroyed?

a)

no

b)

yes

33.

Can energy be changed?

a)

yes

b)

no

34.

How could you increase the gravitational potential energy of an object without changing its mass and gravity?

a)

Make the object larger

b)

Lower the object towards the ground

c)

Raise the object farther off the ground

d)

Allow the object to roll on the ground

35.

Which would have the LEAST gravitational potential energy (GPE)?

a)

A ball sitting on the ground

b)

Moon viewed from the Earth

c)

An airplane flying 30,000 feet above the ground

d)

A rock sitting on top of Mt. Everest

36.

When you are holding a book, energy is stored between the book and Earth; this type of energy is called ________ potential energy.

a)

Kinetic Energy

b)

Chemical Energy

c)

Gravitational Potential Energy

d)

Electric Energy

37.

You throw a ball into the air as shown in the diagram. At what point does the ball have the most gravitational potential energy?

a)

W

b)

X

c)

Y

d)

Z

38.

Which is the correct unit for expressing gravitational potential energy?

a)

Joule

b)

Newton

c)

m/s²

d)

meter

39.

Which of the following is the correct equation for calculating an object's gravitational potential energy?

a)

PE = mgh

b)

PE = mg / h

c)

PE = mg + h

d)

PE = gh

40.

What is the value of the Earth's acceleration due to gravity (g)?

a)

9.81 m/s²

b)

100 m/s²

c)

25 m/s²

d)

3.14 m/s²

41.

What is the gravitational potential energy (GPE) of a 1 kilogram book that is 1 meter above the ground?

g = 9.81 m/s²

a)

9.81 Joules

b)

1.0 Joule

c)

0.10 Joule

d)

11.8 m/s²

42.

In the equation for gravitational potential energy, 'E_p' stands for

a)

electrical energy

b)

elastic potential energy

c)

kinetic energy

d)

gravitational potential energy

43.

The units for mass are...

a)

miles, mi

b)

kilograms, kg

c)

metres, m

d)

grams, g

44.

To convert grams into kilograms...

a)

multiply the grams by 100

b)

divide the grams by 100

c)

multiply the grams by 1000

d)

divide the grams by 1000

45.

5 kJ is the same as

a)

0.005 W

b)

5000 J

c)

0.005 J

d)

5000000 J

46.

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

a)

5,220,411 J

b)

532,695 J

c)

73.7 J

d)

54,356.6 J

47.

What is the gravitational potential energy of a 26 kg eagle, flying at an altitude of 65 m at a speed of 19 m/s?

a)

32,110 J

b)

1690 J

c)

172.4 J

d)

16,562 J

48.

An Olympic high jumper, with a mass of 82 kg, has a maximum gravitational potential energy of 1970 J. How high was the jump?

Let g = 9.8N/kg

a)

24 m

b)

161,540 m

c)

2.5 m

d)

201 m

49.

The world record for pole vaulting is 6.15 m. I the pole vaulter’s gravitational potential energy is 4942 J, what is his mass?

Let g = 9.8N/kg

a)

803.6 kg

b)

504.3 kg

c)

30,393.3 kg

d)

82 kg

50.

One of the tallest radio towers is in Fargo, North Dakota. The tower is 629 m tall. If a bird lands on top of the tower, so that the gravitational potential energy associated with the bird is 2033 J, what is its mass?

Let g = 9.8N/kg

a)

1,278,757 kg

b)

12,531,819 kg

c)

3.25 kg

d)

0.330 kg

e)

0.309 kg

51.

What is the efficiency of a machine if 55.3 J of work are done on the machine, but only 14.3 J or work are done by the machine?

a)

0.25 Joules

b)

26%

c)

3.86 Joules

d)

386%

52.

No machine in existence has 100% efficiency due to ____________________.

a)

magic

b)

friction

c)

smoke

d)

input

53.

Total energy = 200J
Useful energy = 20J

Workout the efficiency of this lightbulb.
$efficiency\ =\ \frac{useful\ enegy}{total\ energy\ in}\ \times100$

a)

100%

b)

80%

c)

40%

d)

10%

54.

Total energy = 350J
Useful energy = 70J

Workout the efficiency of this iphoneX.
$efficiency\ =\ \frac{useful\ energy}{total\ energy\ in}\ \times100\%$

a)

100%

b)

80%

c)

40%

d)

20%

55.

Total energy = 34000J
Useful energy = 340J

Workout the efficiency of this vintage VW Beetle.
$efficiency\ =\ \frac{useful\ energy}{total\ energy\ in}\ \times100\%$

a)

100%

b)

10%

c)

40%

d)

20%

56.

This car needs 8600J of energy to power it. If 5000J is changed into useful energy, how much energy is wasted?

a)

13600J

b)

3600J

c)

5000J

d)

8600J

57.

A car transfers 100 J of chemical energy in order to gain 50 J of kinetic energy. The efficiency of the car is

a)

20%

b)

0.5%

c)

50%

d)

200%

58.

Which of these equations is correct?

a)

$efficiency\ =\ \frac{useful\ energy\ transferred}{total\ energy\ transferred}$

b)

$efficiency\ =\ \frac{total\ energy\ transferred}{useful\ energy\ transferred}$

c)

$energy\ =\ efficiency\ \times100\%$

d)

$efficiency\ =\ \frac{wasted\ energy\ transferred}{total\ energy\ tranferred}$

59.

What is the efficiency of a machine if 55.3 J of work are done on the machine, but only 14.3 J is produced by the 1machine?

a)

0.25 J

b)

26%

c)

386%

d)

3.86 J

60.

What is the work output of a machine that has a work input of 2,800 Joules and an efficiency of 92.3%?

a)

2,690J

b)

92.3J

c)

0.0082J

d)

2,584.4

61.

What is the useful work output of a machine that consumes 2,800 Joules and an efficiency of 40%?

a)

7000 J

b)

2760 J

c)

1120 J

62.

Lucas has been challenged to increase the efficiency of a device he is redesigning. His goal is 90% efficiency. The work input of the device is fixed at 10 joules, so Lucas is trying to improve work output. How many joules of work output should Lucas aim for to attain his goal of 90% efficiency?

a)

9 Joules

b)

900 Joules

c)

0.9 Joules

d)

25

63.

When a pendulum swings, at which point is potential energy highest?

a)

1

b)

2

c)

3

d)

4

Kinetic and Potential Energy and Efficiency

Total questions: 63

Worksheet time: 1hrs 3mins

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