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Energy Y9

Total questions: 73

Worksheet time: 1hrs 2mins

Name
Class
Date
1.

Energy is measured in.....

a)

kilograms

b)

metres per second

c)

Joules

d)

metres

2.

Which energy store is missing? Magnetic, electrostatic, nuclear, gravitational, elastic, thermal, chemical and....

a)

heating

b)

lighting

c)

kinetic

d)

sounding

3.

Energy cannot be created or destroyed, it can only be _________ between the stores

a)

removed

b)

dissipated

c)

transferred

d)

stored

4.

When a kettle boils, energy is transferred from the electrostatic store to the _________________ energy store.

a)

chemical

b)

kinetic

c)

elastic

d)

thermal

5.

On a rollercoaster, the gravitational potential is at its highest/lowest when it reaches the top of the track

a)

highest

b)

lowest

6.

What is the equation to work out kinetic energy?

a)

mass x velocity

b)

0.5 x mass x velocity

c)

0.5 x mass x velocity3

d)

0.5 x mass x velocity2

7.

What is the equation to work out gravitational potential energy?

a)

mass x gravitational field strength x height

b)

0.5 x mass x velocity2

c)

mass x height

d)

height x gravitational field strength

8.

What is the unit of measurement for mass?

a)

grams

b)

kilograms

c)

metres

d)

metres per second

9.

Power = ______________ ÷\div   time

a)

mass

b)

height

c)

energy

d)

work done

10.

What is the unit of measurement for Power?

a)

metres

b)

kilograms

c)

Watts

d)

Joules

11.

Which of the following is NOT a store of energy?

a)

Kinetic

b)

Gravitational Potential

c)

Elastic potential

d)

Thermal

e)

Sound

12.

The energy in which store increases as a car moves faster?

a)

Gravitational Potential

b)

Thermal

c)

Chemical

d)

Kinetic

e)

Elastic Potential

13.

The energy in which store decreases as a car moves faster?

a)

Gravitational Potential

b)

Thermal

c)

Chemical

d)

Kinetic

e)

Elastic Potential

14.

The energy in which store decreases as a fire burns?

a)

Gravitational Potential

b)

Thermal

c)

Chemical

d)

Kinetic

e)

Elastic Potential

15.

The energy in which store increases as a rubber band is stretched?

a)

Gravitational Potential

b)

Thermal

c)

Chemical

d)

Kinetic

e)

Elastic Potential

16.

___________ is when energy is transferred because a force moves an object over a distance.

a)

Electrical work

b)

Mechanical work

c)

Heating

d)

Radiation

17.

___________ is when energy is transferred because electricity flows.

a)

Electrical work

b)

Mechanical work

c)

Heating

d)

Radiation

18.

___________ is when energy is transferred between areas with different temperatures.

a)

Electrical work

b)

Mechanical work

c)

Heating

d)

Radiation

19.

When a kettle boils, how is energy transferred to the thermal store of the water?

a)

Electrical work

b)

Mechanical work

c)

Heating

d)

Radiation

20.

A hot drink has...

a)

Kinetic Energy

b)

Heat Energy

c)

Thermal Energy

d)

Nuclear Energy

21.

A cyclist at the top of a hill has...

a)

Kinetic Energy

b)

Chemical Potential Energy

c)

Elastic Potential Energy

d)

Gravitational Potential Energy

22.

Humans get their energy from...

a)

Chemical Potential Energy

b)

Thermal Energy

c)

Kinetic Energy

d)

Nuclear Energy

23.

Energy Stored in an atoms nucleus is..

a)

Atomic Energy

b)

Electrostatic Energy

c)

Nuclear Energy

d)

Elemental Energy

24.

Energy stored in objects being stretched or squashed...

a)

Elastic Potential Energy

b)

Kinetic Energy

c)

Chemical Energy

d)

Thermal Energy

25.
What type of energy is stored in food and fuel?
a)
Chemical
b)
Thermal
c)
Potential
d)
Calories
26.
When an object is moved to a higher position, what name is given to the energy it then stores?
a)
Gravitational Potential
b)
Elastic
c)
Height
d)
Kinetic
27.
A TV does not give off this type of energy.
a)
Light
b)
Thermal
c)
Sound
d)
Solar
28.

The diagram shows a cart moving freely along a track. What happens to the energy of the cart as it moves from point A to point B on the diagram?

a)

GPE is transformed to kinetic energy.

b)

Kinetic energy is transformed to GPE

c)

Both GPE and kinetic energy stay the same.

29.

Which term describes the energy that is stored due to the height of an object above the ground?

a)

kinetic energy

b)

chemical energy

c)

mechanical energy

d)

gravitational potential energy

30.

What form of energy transfer is most likely responsible when your clothes dryer dries your clothes?

a)

Potential to Chemical to Nuclear

b)

Kinetic to Thermal to Light

c)

Chemical to Mechanical to Electrical

d)

Electrical to Kinetic and Thermal

31.
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 
32.

What is the equation for calculating gravitational potential energy

a)

mv

b)

1/2 mv^2

c)

mgh

d)

Ft

33.

What is the equation for calculating kinetic energy?

a)

mv

b)

1/2 mv^2

c)

mgh

d)

Ft

34.

Calculate the potential energy of a car with a mass of 2,500 kg that is on a hill 100 meters above sea level. (g = 10 Nkg-1)

a)

250,000 J

b)

2,500,000 J

c)

25,000,000 J

d)

250 J

35.

Lilly's cat ran through your yard. The cat has a mass of 5 kg. He is running at a speed of 3 m/s. What is the kinetic energy of the cat as he runs? (KE = 1/2mv2)

a)

8.5 J

b)

45 J

c)

7.5 J

d)

22.5 J

36.

Alice kicks a soccer ball with a mass of 2.1 kg. The ball leaves the ground moving 30 meters per second. What is the kinetic energy of the soccer ball? (KE = 1/2mv2)

a)

567 J

b)

900 J

c)

945 J

d)

30 J

37.

If the 0.3 kg marble was moving at 6 m/s at the bottom of the ramp, how much kinetic energy did the marble have? (KE = 1/2mv2)

a)

5.4 J

b)

1.8 J

c)

3 J

d)

6 J

38.

If the 1.2 kg basketball rolls at 3 m/s, what is it's kinetic energy? (KE = 1/2mv2)

a)

2.7

b)

5.4

c)

3.6

d)

9

39.

A 5 Kg body is having a Kinetic energy of 250 J. What is the velocity (or speed) of the body?

a)

10 m/s

b)

15 m/s

c)

20 m/s

d)

40 m/s

40.

What is the mass of a ball that has a kinetic energy of 115 J and is traveling at a speed of 9 m/s?

a)

1035 kg

b)

23.5 kg

c)

12.8 kg

d)

2.84 kg

41.

Which point has the most potential energy?

a)

G

b)

F

c)

B

d)

A

42.
2. The diagram to the right represents a diver’s motion from the top of a high diving board into a pool of water. At what point does the diver have the greatest kinetic energy and the least potential energy?
a)
1
b)
2
c)
3
d)
4
43.

The coaster at B is at -

a)

Maximum PE, Minimum KE

b)

Minimum PE, Minimum KE

c)

Minimum PE, Maximum KE

d)

Maximum PE, Maximum KE

44.

If the marble had a mass of 0.3kg and the hill was 2.3 m tall, how much potential energy did it have at the top of the ramp?

a)

2.3

b)

.23

c)

6.9

d)

5.2

45.

If the 0.3 kg marble was moving at 6 m/s at the bottom of the ramp, how much kinetic energy did the marble have?

a)

5.4 J

b)

1.8 J

c)

3 J

d)

6 J

46.

Calculate Elastic energy in a spring compressed 0.25m, when the spring's spring constant is 350N/m.

a)

21.8 J

b)

50 J

c)

87.5 J

d)

10.9 J

47.

A spring compressed .4 m has a 15 J of elastic energy present. Calculate the spring constant.

a)

120 J

b)

187.5 J

c)

75 J

d)

93.75 J

48.

The force of gravity is represented as which figure?

a)

9.8m/s

b)

8.9m/s

c)

343m/s

d)

19.8m/s

49.

Movement energy is technically referred to as (a)   energy.

50.

Heat transfer that is shown in the picture is called ....

a)

radiation

b)

conduction

c)

convection

d)

friction

51.
Wind energy 
a)
is less expensive than fossil fuels
b)
is difficult to utilize in areas with low wind availability
c)
is a renewable source of energy
d)
utilizes small or large areas of land not previously used
52.
Which of the following energy resources is nonrenewable?
a)
Biomass
b)
Geothermal
c)
Fossil Fuel
d)
Hydropower
53.
Which energy resource, once depleted, is essentially nonrenewable?
a)
Coal
b)
Solar
c)
Biomass
d)
Wind
54.
Coal, oil, and natural gas are _____ resources created from the remains of early plants and animals.
a)
natural
b)
small
c)
large
d)
waste
55.
____ is the remains of plants and animals.
a)
Biomass
b)
Natural gas
c)
Geothermal
d)
Hydropower
56.
Hydroelectric power produces electricity using.....
a)
Wind
b)
Sunlight
c)
Moving water
d)
Dung
57.
No machine in existence has 100% efficiency due to ____________________.
a)
magic
b)
friction
c)
smoke
d)
input
58.

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%

59.

Total energy = 350J
Useful energy = 70J

Workout the efficiency of this iphoneX.
efficiency = useful energytotal energy in ×100%efficiency\ =\ \frac{useful\ energy}{total\ energy\ in}\ \times100\%  

a)

100%

b)

80%

c)

40%

d)

20%

60.

Total energy = 34000J
Useful energy = 340J

Workout the efficiency of this vintage VW Beetle.
efficiency = useful energytotal energy in ×100%efficiency\ =\ \frac{useful\ energy}{total\ energy\ in}\ \times100\%  

a)

100%

b)

10%

c)

40%

d)

20%

61.

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

62.

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%

63.
What is the efficiency of the machine if the input is 263 J and the output is 142 J? 
a)
6.26%
b)
54%
c)
100%
d)
260%
64.

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

65.

Ian and Steve ski down the 75 m slope in 80 seconds using 400 N of penguin force. Calculate their penguin power!

a)

375 W

b)

37.5 W

c)

426.7 W

d)

240 000W

66.
What is the SI unit for power?
a)
watt
b)
joule
c)
newton
d)
kilogram
67.
Power is
a)
the ability to do work.
b)
the rate at which work is done.
c)
the force applied to an object for a distance.
d)
none of the above.
68.

A machine transfers 800 J of energy in 4 seconds. What is its power?

a)

200 watts

b)

100 watts

c)

400 watts

d)

600 watts

69.

A light bulb has a power of 60 watts. If it is used for 5 seconds, how much energy does it consume?

a)

12 J

b)

120 J

c)

300 J

d)

600 J

70.

A fan does 200 J of work in 4 seconds. What is its power?

a)

50 Watts

b)

100 Watts

c)

200 Watts

d)

400 Watts

71.

Which of the following is an example of elastic potential energy?

a)

A falling rock

b)

Boiling water

c)

A moving car

d)

A stretched rubber band

72.

What happens to the kinetic energy of a ball when it comes to a stop?

a)

It increases

b)

It becomes chemical energy

c)

It is transferred to thermal energy

d)

It is destroyed

73.

Which equation would you use to calculate the elastic potential energy stored in a spring?

a)

1/2 mv^2

b)

mgh

c)

1/2 kx^2

d)

Ft

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