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Energy All

Total questions: 97

Worksheet time: 5hrs 52mins

Name
Class
Date
1.

Energy stored because of gravity is called:

a)

Gravitational Potential Energy

b)

Kinetic Energy

c)

Mechanical Advantage

d)

Chemical Energy

2.

At which point does the ball has the greatest gravitational potential energy (GPE)?

a)

A

b)

G

c)

D

d)

C

e)

G

3.

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

4.

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

5.

How could you increase the object's gravitational potential energy (GPE) without changing its distance from the ground (height) and gravity?

a)

Decrease the object's mass

b)

Increase the object's height

c)

Increase the object's mass

d)

Decrease the object's height

6.

____________ is the ability to do work.

a)

Energy

b)

Force

c)

Friction

d)

Motion

7.

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

8.

Gravitational potential energy depends on the strength of gravity, ________ and ________ of the object.

a)

height and mass

b)

friction and movement

c)

mass and movement

d)

height and friction

9.

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

10.

At which position does the child on the swing have the most gravitational potential energy?

a)

W

b)

X

c)

Y

d)

Z

11.

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

a)

W

b)

X

c)

Y

d)

Z

12.

What kind of energy is in a rock at the edge of a cliff?

a)

Gravitational Potential Energy

b)

Kinetic Energy

c)

Both potential and kinetic energy

d)

none of the above

13.

Which is the correct unit for expressing gravitational potential energy?

a)

Joule

b)

Newton

c)

m/s2

d)

meter

14.

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

a)

GPE = mgh

b)

GPE = mg / h

c)

GPE = mg + h

d)

GPE = gh

15.

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

a)

10 m/s2

b)

100 m/s2

c)

25 m/s2

d)

3.14 m/s2

16.

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

g = 10 m/s2

a)

10 Joules

b)

1.0 Joule

c)

0.10 Joule

d)

10 m/s2

17.

At which point does the ball has the greatest gravitational potential energy (GPE)?

a)

1

b)

2

c)

3

d)

4

18.
What kind of energy is in a rock at the edge of a cliff?
a)
Potential
b)
Kinetic
c)
Both potential and kinetic energy
d)
none of the above
19.

At which point is potential energy greatest?

a)

W

b)

X

c)

Y

d)

Z

20.

At which point does the ball has the least gravitational potential energy (GPE)?

a)

1

b)

2

c)

3

d)

4

21.
When a pendulum swings, at which point is potential energy at its greatest?
a)
1
b)
2
c)
3
d)
4
22.

What is the gravitational field strength denoted by?

a)

h

b)

f

c)

g

d)

m

23.

What is gravity?

a)

The speed at which an object falls

b)

A force of repulsion between two objects

c)

A force of attraction between two objects

d)

A measure of an object's mass

24.

How do you calculate an object's weight?

a)

Mass plus gravitational field strength

b)

Gravitational field strength divided by mass

c)

Mass divided by gravitational field strength

d)

Mass times gravitational field strength

25.

What is the weight of a person with a mass of 60 kilos on Earth?

a)

6 newtons

b)

600 kilograms

c)

60 newtons

d)

600 newtons

26.

What is the difference between mass and weight?

a)

There is no difference

b)

Mass is a force, while weight is an intrinsic property

c)

Mass is measured in newtons, while weight is measured in kilos

d)

Weight is a force, while mass is an intrinsic property

27.

What is the formula for gravitational potential energy?

a)

GPE = mg

b)

GPE = gh

c)

GPE = mgh

d)

GPE = mh

28.

Gravitational potential energy = mass ×g×heightGravitational\ potential\ energy\ =\ mass\ \times g\times height An eagle with a mass of 2 kg is flying at a height of 200 m. What is its gravitational potential energy? (Use g = 10 N/kg)

a)

40 J

b)

400 J

c)

4000 J

d)

40000 J

29.

Gravitational potential energy = mass×g×heightGravitational\ potential\ energy\ =\ mass\times g\times height
A 2kg mass has gravitational potential energy of 580 J. What height is the mass above the ground? (Use g = 10 N/kg)

a)

29 m

b)

58 m

c)

290 m

d)

580 m

30.

Gravitational potential energy=mass×g×heightGravitational\ potential\ energy=mass\times g\times height  

What is the gravitational potential energy stored in a 60 kg boy at the top of 2 m high slide? (Use g = 10 N/kg)

a)

120 J

b)

600 J

c)

1200 J

d)

6000 J

31.

What is the Standard International (S.I) unit of energy?

a)

Newton

b)

Metre

c)

Joule

d)

Watt

32.

The gravity of Earth (gravitational acceleration), g has a value of ______________

a)

8 ms−28\ ms^{-2}

b)

9 ms−29\ ms^{-2}

c)

10 ms−210\ ms^{-2}

d)

11 ms−211\ ms^{-2}

33.

gravitational potential energy is effected by _____ ( select 2 answers)

a)

mass of object

b)

height of object

c)

shape of object

d)

color of object

34.
Energy due to motion is ____________ energy. 
a)
Potential 
b)
Energy
c)
Kinetic
d)
Friction
35.
The faster an object moves, the ________ kinetic energy it has. 
a)
more
b)
less
c)
none of the above
d)
all of the above 
36.
As mass increases, KE ...
a)
increases
b)
decreases
c)
stays the same
37.
Which has a greater impact on KE?
a)
mass
b)
velocity
38.
The SI unit in which kinetic energy is measured is 
a)
Newton
b)
Kilogram
c)
Joules
d)
Metres per second
39.
Rearrange the equation for kinetic energy to make mass the subject of the equation.
a)
m = KE/2v2
b)
m = 2KE/v2
c)
m = v2/2KE
d)
m = 2v2/KE
40.
Rearrange the equation for kinetic energy to make velocity squared the subject of the equation.
a)
v2 = KE/2m
b)
v2 = 2m/KE
c)
v2 = 1/2 KE m
d)
v2 = 2KE/m
41.
Rearrange the equation for kinetic energy to make velocity the subject of the equation.
a)
v = √(2KE/m)
b)
v2 = 2KE/m
c)
v = √(m/2KE)
d)
v = √(KE/2m)
42.
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
43.
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
44.
What is the kinetic energy of a 4kg shotput thrown with a velocity of 13m/s
a)
676 J
b)
3.25 J
c)
17J
d)
338 J
45.
What is the kinetic energy of a ball with a mass of 5kg rolling at 10m/s
a)
50 J
b)
5 J
c)
250 J
d)
25 J
46.
A golf pro swings his driver which weighs 0.75Kg at a velocity of 60 m/s. Calculate the kinetic energy of the club.
a)
2700 J
b)
16.9 J
c)
1350 J
d)
45 J
47.
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
48.
A rabbit of mass 3kg walks at a speed of 0.5m/s. Calculate its kinetic energy.
a)
0.5 J
b)
0.75 J
c)
0.255 J
d)
0.375 J
49.
How much kinetic energy does a person of mass 50kg running at 3m/s have? Provide your answer in KJ.
a)
225 KJ
b)
0.225 KJ
c)
75 KJ
d)
0.075 KJ
50.
A moving 10 kilogram object has 20 Joules of kinetic energy. What is its velocity?
a)
2 m/s
b)
4 m/s
c)
200 m/s
d)
10 m/s
51.
What is the mass of a moving object that has 100 Joules of kinetic energy and moves at a velocity of 2 m/s?
a)
50 kg
b)
200 kg
c)
25 kg
d)
100 kg
52.
An explosion of gas from a Hawaiian volcano blows a rock into the sky. the rock has 2000J of kinetic energy. What was its mass if the rock had a velocity of 20m/s
a)
200Kg
b)
20,000Kg
c)
10Kg
d)
200Kg
53.
An 8kg dog chases a cat. if the dog has 400J of kinetic energy. What is the speed of the dog?
a)
10 m/s
b)
5 m/s
c)
1 m/s
d)
100 m/s
54.

The Law of Conservation of Energy states:

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.

55.

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

56.

A kettle uses 100J of electrical energy to produce 7J of sound energy and 93J of thermal energy. How efficient is the kettle?

a)

100%

b)

7%

c)

93%

d)

95%

57.

A washing machine uses 250J of electrical energy to produce 125J of useful energy. How efficient is it?

a)

5%

b)

50%

c)

55%

d)

100%

58.
What type of device might this Sankey be about?
a)
A very efficient LED light bulb
b)
A very inefficient incandescent light bulb
c)
A coal power plant
d)
A wind turbine
59.
No machine in existence has 100% efficiency due to ____________________.
a)
magic
b)
friction
c)
smoke
d)
input
60.

Total energy = 200J
Useful energy = 20J

Workout the efficiency of this lightbulb.
efficiency = useful enegytotal energy in ×100efficiency\ =\ \frac{useful\ enegy}{total\ energy\ in}\ \times100  

a)

100%

b)

80%

c)

40%

d)

10%

61.

To save energy, what should you do when you leave a room ?

a)

USE ELECTRICAL ENERGY

b)

SHUT OFF THE LIGHTS AND TELEVISION

c)

TURN ON THE LIGHTS AND TELEVISION

d)

HANG YOUR CLOTHES OUTSIDE

62.

How can you dry your clothes to save energy?

a)

Use the dryer machine

b)

Don't dry your clothes

c)

Leave the fridge door open

d)

Hang the clothes to dry outside on a line

63.
To increase the EFFICIENCY of energy use, we could...
a)
Turn off lights when not in use
b)
Keep the car running as you go into the store
c)
Water the plants in a drought
64.
Another way to save energy is to...
a)
Conserve it
b)
Waste it
c)
Use it
65.
What is energy conservation?
a)
Adding up all your energy use
b)
Reducing energy use
66.

Which of the following is not an energy store?

a)

kinetic

b)

elastic

c)

electrical

d)

thermal

67.

Which of the following are energy stores?

a)

mechanical

b)

nuclear

c)

radiation

d)

magnetic

68.

Which appliance is designed to transfer electrical energy to thermal energy?

a)

A - food mixer

b)

B - kettle

c)

C - lamp

d)

D - radio

69.

Which appliance is designed to transfer electrical energy to kinetic energy?

a)

A - food mixer

b)

B - kettle

c)

C- lamp

d)

D - radio

70.

Before the student jumps from the bridge he has a store of ______________ energy.

When he is falling, the student's store of ______________

energy increases.

When the bungee cord is stretched, the cord stores energy as ______________ energy.

a)

gravity, kinetic, elastic

b)

elastic, kinetic, gravitational

c)

gravitational, kinetic, elastic

d)

gravitational, movement, stretching

71.

Which is the correct equation for calculating efficiency?

a)

efficiency =(useful energy output)/(total energy input)×100%

b)

efficiency =(useful energy input)/(total energy output)×100%

c)

efficiency =(total energy output)/(useful energy input)×100%

d)

efficiency =(waste energy output)/(total energy input)×100%

72.

A fluorescent lamp is 25% efficient. Choose the statement that correctly describes how the lamp performs.

a)

the lamp only works for quarter of the time.

b)

25% of the electrical energy transferred to the lamp is wasted

c)

the lamp does not work properly

d)

25% of the energy supplied to the lamp is transferred to light

73.

An electric motor is used to raise an object. The object's gravitational potential energy store increases by 60J when the motor is supplied with 200J of energy by an electric current. Calculate the percentage efficiency of the motor.

(a)  

74.

Calculate the efficiency of the TV.

a)

60%

b)

56%

c)

4%

d)

39%

75.

A power station needs an input of 188 J each second to operate a single 60 W lamp in a house. The Sankey diagram shows what happens to the input energy at each stage. Calculate the overall efficiency from power station input to lamp.

a)

2.6 %

b)

0.80 %

c)

2.5 %

d)

0.0080 %

76.

What energy store does a battery have?

a)

Chemical potential

b)

Electric potential

c)

Elastic potential

d)

Gravitational potential

77.

In a table lamp how is the energy transferred from the batteries to the bulb

a)

By heating

b)

Kinetically

c)

Mechanically

d)

Electrically

78.

Which of the following requires the most energy?

a)

Sleeping

b)

Watching Television

c)

Walking

d)

Running

79.

Which of the following requires the least energy?

a)

Sleeping

b)

Watching Television

c)

Walking

d)

Running

80.

Which of the following requires the most energy?

a)

Cycling

b)

Playing golf

c)

Laying down

d)

Reading

81.

Which of the following foods contain the greatest store of chemical energy

a)

Lettuce

b)

Butter

c)

Cereal

d)

Chicken

82.

Which of the following foods contain the least store of chemical energy

a)

Lettuce

b)

Butter

c)

Cereal

d)

Chicken

83.

A hot drink has what type of energy store?

a)

Kinetic Energy

b)

Heat Energy

c)

Thermal Energy

d)

Nuclear Energy

84.

A cyclist at the top of a hill has what type of energy store?

a)

Kinetic Energy

b)

Chemical Potential Energy

c)

Elastic Potential Energy

d)

Gravitational Potential Energy

85.

Humans get their energy from has what type of energy store?

a)

Chemical Potential Energy

b)

Thermal Energy

c)

Kinetic Energy

d)

Nuclear Energy

86.

Energy stored in an atom's nucleus is what type of energy store?

a)

Atomic Energy

b)

Electrostatic Energy

c)

Nuclear Energy

d)

Elemental Energy

87.

Energy stored in objects being stretched or squashed...

a)

Elastic Potential Energy

b)

Kinetic Energy

c)

Chemical Energy

d)

Thermal Energy

88.
What type of energy is stored in food and fuel?
a)
Chemical
b)
Thermal
c)
Potential
d)
Calories
89.

Batteries are an example of which type of energy store?

a)

Thermal

b)

Magnetic

c)

Chemical

d)

Gravitational potential

90.

Energy transferred by a force is a ​ (a)   transfer.

Choose from the below words
mechanical
electrical
heating
radiation
91.

Energy transferred through wires is an example of:

a)

Mechanical transfer

b)

Electrical transfer

c)

Heating

d)

Radiation

92.

Conduction, convection and radiation are examples of which energy transfer?

a)

Mechanical transfer

b)

Electrical transfer

c)

Heating

d)

Radiation

93.

A ball drops to the floor and makes a sound. Which form of energy transfer is this?

a)

Mechanical transfer

b)

Electrical transfer

c)

Heating

d)

Radiation

94.

Friction is which form of energy transfer?

a)

Mechanical transfer

b)

Electrical transfer

c)

Heating

d)

Radiation

95.

A cyclist starts at the top of the top of a hill and rolls to the bottom of the hill. His ​ (a)   energy store decreases. His ​ (b)   energy store increases. Energy is transferred ​ (c)   .

Choose from the below words
gravitational potential
kinetic
mechanically
chemical
thermal
electrically
by heating
96.

A battery is used to power a light bulb using wires.

The ​ (a)   store of the battery decreases. The ​ (b)   store of the light bulb increases. The energy is transferred ​ (c)   .

Choose from the below words
chemical
thermal
electrically
nuclear
heating
kinetic
97.

A car engine burns petrol and turns the wheels of a car.

The ​ (a)   store of the petrol decreases when burned in an engine. The ​ (b)   store of the wheels increases. The energy is transferred ​ (c)   .

Choose from the below words
kinetic
chemical
mechanically
electrically
gravitational potential
thermal

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