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G10 Review EASE 2

Total questions: 90

Worksheet time: 1hrs 9mins

Name
Class
Date
1.
Fossil fuels are nonrenewable  resources because they
a)
take millions of years to form
b)
are easily replaced
c)
are in high demand
d)
don't pollute the air
2.
Besides coal and natural gas, another fossil fuel  is
a)
petroleum/oil
b)
biomass
c)
electricity
d)
uranium
3.
All of the following are renewable except
a)
uranium
b)
solar
c)
hydropower
d)
food crops (biomass)
4.
According to the graph, what sector is the greatest user of energy?
a)
industry
b)
commercial
c)
transportation
d)
residential
5.

When energy is transferred, which store of energy aways increases?

a)

kinetic energy

b)

potential energy

c)

thermal energy

d)

mechanical energy

6.
Energy is measured using which unit?
a)
Grams
b)
Meters
c)
Watts
d)
Joules
7.

A solar cell is used to recharge a battery. The solar cell produces 0.80 W of electrical power.

The cell is 20% efficient.

What is the power input of the sunlight onto the solar cell?

a)

0.16 W

b)

4.0 W

c)

8.0 W

d)

16 W

8.

A lamp has a power input of 5.0 W. It wastes 1.0 W of power heating the surroundings.

What is the efficiency of the lamp?

a)

20%

b)

50%

c)

80%

d)

120%

9.

What is carbon capture ?

a)

Trapping fossil fuels to stop them being burned and polluting the atmosphere

b)

A computer system to work out how much carbon dioxide is produced by coal fuelled power stations

c)

The capture of harmful carbon dioxide emissions for safe storage deep underground

10.

A hot drink has...

a)

Kinetic Energy

b)

Heat Energy

c)

Thermal Energy

d)

Nuclear Energy

11.

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

a)

Kinetic Energy

b)

Chemical Potential Energy

c)

Elastic Potential Energy

d)

Gravitational Potential Energy

12.

Energy stored in objects being stretched or squashed...

a)

Elastic Potential Energy

b)

Kinetic Energy

c)

Chemical Energy

d)

Thermal Energy

13.
What type of energy is stored in food and fuel?
a)
Chemical
b)
Thermal
c)
Potential
d)
Calories
14.
What form of energy is also described as "energy of motion"?
a)
Potential
b)
Mechanical
c)
Kinetic
d)
Electrical
15.
"Stored energy" is another way of describing what energy type?
a)
Potential
b)
Electrical
c)
Kinetic
d)
Mechanical
16.
What type of energy transfer is most likely responsible when a plant converts the suns energy into food?
a)
Chemical to Solar
b)
Solar to chemical
c)
Light to electrical
d)
Electrical to chemical
17.

Conservation of energy means that...

a)

Energy can be destroyed and made before being transferred

b)

Energy can't be made or destroyed it can only transferred from one store to another

c)

Energy can be made and destroyed

d)

Energy can be made and destroyed then transferred from one store to another

18.

A car moves faster? Which energy store increases?

a)

Gravitational Potential Energy

b)

Kinetic Energy

c)

Thermal Energy

d)

Kinetic Energy

19.

The energy in which store decreases as a candle burns? 

a)

Chemical energy store

b)

Kinetic energy store

c)

Nuclear energy store

20.

________ is when energy is transferred between areas that have different temperatures. 

a)

By radiation

b)

By heating

c)

Mechanically

d)

Nuclear

21.

Energy is transferred _______________ due to charge flowing around a circuit. 

a)

Electrically

b)

Kinetic

c)

Mechanically

d)

By radiation

22.

Two negatively charged particles which are close together have energy in this energy store

a)

Electrostatic

b)

Magnetic

c)

Nuclear

d)

Elastic

23.

Energy can be stored in different ways. The bond between two particles has energy in its __________ energy store.

a)

Thermal

b)

Chemical

c)

Kinetic

d)

Gravitational potential

e)

Elastic potential

24.

A student picks up a book off the floor and puts it on a high shelf. Which energy store has been filled /increased in this process?

a)

Thermal

b)

Chemical

c)

Kinetic

d)

Gravitational potential

e)

Elastic potential

25.

There are different ways that energy can be transferred from one energy store to another. Energy is transferred __________ when there is a difference in temperature between two objects.

a)

By electrical current

b)

By heating

c)

Mechanically (by forces)

d)

By radiation/waves (light, sound, etc.)

26.

Energy is transferred __________ when a wave (e.g. visible light or infrared) transfers energy from an object to its surroundings.

a)

By electrical current

b)

By heating

c)

Mechanically (by forces)

d)

By radiation/waves (light, sound, etc.)

27.

Which of the following equations is correct? [Work done = W, Force = F, distance = s]

a)

F = W x s

b)

W = s/F

c)

W = F/s

d)

F = W/s

28.
What is the unit of measurement for power?
a)
Joules
b)
Watts
c)
Voltage
d)
Calories
29.
How do you calculate power?
a)
P = W/t
b)

P = ma

c)

P = W * t

d)

P = F x d

30.
What is energy?
a)
Force applied over a distamce
b)
How much work is done.
c)
Ability to do work
31.
What is power?
a)
transfer a force through a distance
b)
the rate of speed 
c)
the rate of work being done
d)
transfer of space over time
32.

Rank in order, from largest to smallest, the gravitational potential energies of the balls.

a)

1 > 2 = 4 > 3

b)

1 > 2 > 3 > 4

c)

3 > 2 = 4 > 1

d)

3 > 2 > 4 > 1

33.
a)

A

b)

B

c)

C

d)

D

34.

A soccer player kicks a ball with 20 Newtons of force causing it to travel 100 meters. How much work is done on the ball?

a)

200 J

b)

80 J

c)

5 J

d)

2000 J

35.

A worker climbs a ladder and does 8 J of work on a 2 N object. What is the distance they lift the object?

a)

18 m

b)

4 m

c)

10 m

d)

6 m

36.
How much work is being done with 200 N of force over 426 meters?
a)
85,200 J
b)
45,620 J
c)
90,480 J
d)
62,329 J
37.

Bob (80 kg) uses 180 N of force to get him up the slope. The vertical distance is 2 m and the diagonal is 10 m. Calculate the work he does.

a)

1600 J

b)

160 J

c)

3600 J

d)

1800 J

38.

What is the work output of a machine that has a work input of 2,800 Joules and an efficiency of 90%?

a)

25200 J

b)

2520 J

c)

0.0082J

39.

Two army persons A and B each of weight of 500 N climb up a rope through a height of 10 m. A takes 20 s while B takes 40 s to achieve this task. What is ratio of the powers of person A and B?

a)

1:2

b)

1:4

c)

2:1

d)

14:1

40.

If speed of a car becomes 2 times, its kinetic energy becomes

a)

4 times

b)

8 times

c)

16 times

d)

12 times

41.

What is the work done in moving the pendulum with mass 0.25 kg through a height of 0.5 m?

a)

0.125 J

b)

  1. 0.00125 J

c)

1.25 J

d)

2 J

42.

Another pendulum has a mass of 200 g and falls through a height of 0.25 m. Assuming there is no air resistance, what is the pendulum’s maximum speed at the bottom of its fall (g = 10 m/s^2)?

a)

2.2 m/s

b)

5 m/s

c)

10 m/s

d)

100 m/s

43.

A student lifts a 15 N mass through a distance of 1.5 m. What is the work done?

a)

22.5 J

b)

10 J

c)

0.1 J

d)

15 J

44.

A weightlifter lifts a barbell of mass 45 kg through a height of 0.75 m. What is the gravitational potential energy gained by the barbell (gravity = 10 N/kg)?

a)

60 J

b)

100 J

c)

337.50 J

d)

33.75 J

45.

A motorcyclist is travelling at a speed of 35 m/s. The engine of the bike provides a force of 250 N to the motorbike. What is the work done by the motorbike in 1 second?

a)

7 J

b)

8750 J

c)

140 J

d)

10 000 J

46.

A ball of mass 50 g is suspended at a height of 2.5 m from the ground. What would be the maximum value for kinetic energy the instant before the ball hits the ground? Assume air resistance is negligible.

a)

0 J

b)

1.25 J

c)

12 500 J

d)

1250 J

47.

An asteroid of mass 500 kg approaches the Earth’s ground at a speed of 1000 m/s. What is the kinetic energy of the asteroid?

a)

250 × 10^6 J

b)

5.0 × 10^6 J

c)

250 kJ

d)

500 kJ

48.

The power output of a pulley system on a building site is 15 kW. If a load of 5000 N is placed on the bottom of the pulley, how far does the load travel in 3 seconds?

a)

15 m

b)

5 m

c)

9 m

d)

3 m

49.

A ball of mass 50 g is suspended at a height of 2.5 m from the ground. What is the maximum gravitational potential energy of the suspended ball?

a)

0 J

b)

1.25 J

c)

12 500 J

d)

1250 J

50.
Question What happens to the spring constant when the spring is stretched?
a)
The spring constant remains the same
b)
The spring constant increases
c)
The spring constant decreases
d)
The spring constant becomes zero
51.
Question A force of 20 N is applied to an object with an area of 2 m^2. What is the pressure exerted on the object?
a)
10 Pa
b)
20 Pa
c)
40 Pa
d)
60 Pa
52.
Question A spring has a spring constant of 5 N/m. What is the extension of the spring when a force of 20 N is applied to it?
a)
4 m
b)
5 m
c)
10 m
d)
25 m
53.
Question What is the pressure exerted by a force of 50 N on an area of 5 m^2?
a)
250 Pa
b)
10 Pa
c)
25 Pa
d)
50 Pa
54.
Question A spring has a spring constant of 100 N/m. What is the extension of the spring when a force of 20 N is applied to it?
a)
0.2 m
b)
2 m
c)
0.5 m
d)
5 m
55.
Question Which of the following is true regarding the pressure at the bottom of a container filled with a liquid?
a)
The pressure is equal to the pressure at the top of the container
b)
The pressure is equal to the weight of the container
c)
The pressure is equal to the weight and depth of the liquid
d)
The pressure is equal to the sum of the weight of the liquid and the weight of the container
56.
Question A diver is at a depth of 22 meters in seawater, which has a density of 1025 kg/m³. What is the pressure the diver experiences due to the seawater? (g = 10 m/s^2)
a)
196,000 Pa
b)
215,000 Pa
c)
205,000 Pa
d)
225,000 Pa
57.
Question In a hydraulic system, if the area of the smaller piston is 5 cm² and the area of the larger piston is 20 cm², what force is required to apply a pressure of 2.5 Pa to the smaller piston?
a)
0.00125 N
b)
50 N
c)
0.002 N
d)
0.005 N
58.
Question
a)
A
b)
B
c)
C
d)
D
59.
Question
a)
force decreased ; pressure decreased
b)
force unchanged ; pressure decreased
c)
force decreased ; pressure unchanged
d)
force unchanged ; pressure unchanged
60.
Question
a)
30 N
b)
35 N
c)
40 N
d)
50 N
61.
Question
a)
decreasing the surface area of the stone
b)
lowering the stone deeper into the liquid
c)
increasing the mass of the stone
d)
using a liquid with a lower density
62.
Question
a)
A
b)
B
c)
C
d)
D
63.
Question
a)
P
b)
Q
c)
R
d)
any of P, Q or R
64.
Question
a)
0.13 N / cm
b)
0.19 N / cm
c)
0.14 N / cm
d)
0.25 N / cm
65.
Question
a)
A
b)
B
c)
C
d)
D
66.
Question Which figure is missing from the table ?
a)
17.2
b)
17.4
c)
17.3
d)
17.6
67.
Question What is the extension of the spring when a load of 2.0 N is applied to it ?
a)
5.0 cm
b)
4.5 cm
c)
3.0 cm
d)
8.0 cm
68.
Question Which of the following statements are correct ?
a)
The water exerts the greatest pressure on the base of vessel P
b)
The water exerts the same force on the base of each vessel
c)
The water exerts the same pressure on the base of each vessel
d)
The water exerts the greatest pressure on the base of vessel S
69.
Question What name is given to the energy of a moving object?
a)
kinetic energy (k.e.)
b)
gravitational potential energy (g.p.e.)
c)
chemical energy
d)
electrostatic energy
70.

Question Calculate the kinetic energy of a car of mass 600 kg travelling at 25 m/s.

a)

187,500 J

b)

93,750 J

c)

375,000 J

d)

225,000 J

71.

Question A walker carrying a 20 kg backpack climbs to the top of a mountain 2500 m high. Calculate the gain in gravitational potential energy of the pack. (Acceleration due to gravity g = 10 m/s).

a)

50,000 J

b)

500,000 J

c)

5,000,000 J

d)

50,000,000 J

72.

Question Calculate the velocity of a truck with kinetic energy 2.7 kJ and mass 600 kg.

a)

3 m/s

b)

6 m/s

c)

9 m/s

d)

12 m/s

73.

Question Taking g = 9.8N/kg, calculate the gravitational potential energy gained by a mass of 5.1kg raised to a height of 25 m above the ground.

a)

1250 J

b)

1176 J

c)

1323 J

d)

1029 J

74.

Question Calculate the kinetic energy of a mass of 5kg travelling at a velocity of 12m/s.

a)

240 J

b)

360 J

c)

480 J

d)

600 J

75.
Question Describe the energy transfers taking place when charging a mobile phone, including the energy that is wasted.
a)

Electrical energy is converted directly into chemical energy in the battery.

b)

Electrical energy is converted into chemical energy in the battery, with some energy lost as heat.

c)

Chemical energy from the wall socket is converted into electrical energy in the battery.

d)

Electrical energy is converted into light and sound energy, with no energy loss.

76.

Question

An athlete of mass 70 kg runs up a hill. The foot of the hill is 300 meters above sea-level. The summit is 1200 meters above sea-level. By how much does the athlete’s g.p.e. increase? Assume that acceleration due to gravity g = 10 m/s2.

a)

63,000 J

b)

315,000 J

c)

420,000 J

d)

900,000 J

77.

Question A van of mass 2000 kg is travelling at 15 m/s. Its speed increases to 25 m/s. By how much does its kinetic energy increase?

a)

225,000 J

b)

400,000 J

c)

625,000 J

d)

800,000 J

78.

A crane lifts a load of 800 N to a height of 5 m. How much work is done by the crane?

a)

4000 J

b)

8000 J

c)

2000 J

d)

1000 J

79.

What type of energy is associated with the position of an object in a gravitational field?

a)

Kinetic

b)

Thermal

c)

Gravitational potential

d)

Chemical

80.

A car engine does 3000 J of work in 10 seconds. What is the power output of the engine?

a)

600 W

b)

150 W

c)

300 W

d)

1000 W

81.

Look at the graph. Which material is the stiffest?

a)

A

b)

B

c)

C

d)

D

82.

This spring obeys Hooke’s law and stretches from 8 cm to 18 cm when a force of 20 N is applied. What is its total length, in cm, when a force of 30 N is applied?

a)

23

b)

26

c)

27

d)

30

83.

Heavy furniture sometimes marks the floor on which it stands. Four tables of the same weight each have four legs. The figure shows part of a leg from each table. Which table is least likely to mark the floor?

a)

A

b)

B

c)

C

d)

D

84.

Which of the following energy resources does not depend on sunlight?


a)

hydroelectric power

b)

tidal

c)

coal

d)

wind

85.

Which of the following energy resources produces greenhouse gases?


a)

hydroelectric power

b)

nuclear

c)

biofuels

d)

natural gas

86.

Which of these power stations generates electricity from gravitational potential energy?


a)

tidal power station

b)

geothermal power station

c)

wind power

d)

nuclear power station

87.

A man pushes a 25 kg pram up a slope as shown in the diagram. He pushes with a force of 150 N along the 20 m slope. How much energy is dissipated as thermal energy?

a)

250 J

b)

500 J

c)

2000 J

d)

2500 J

88.

A car of mass 800 kg accelerates from rest to a speed of 25 m/s in 10 s. What is its power?

a)

25,000 W

b)

50,000 W

c)

75,000 W

d)

100,000 W

89.

It is estimated that the human brain has a power requirement of 40 W. How much energy does it use in an hour?

a)

144,000 J

b)

240,000 J

c)

360,000 J

d)

480,000 J

90.

A man is trying to move his washing machine into the back of a removal van. The washing machine has a weight of 650 N and the floor of the removal van is 0.80 metres above the ground. Calculate the work the man does when he pushes the washing machine up the ramp into the back of the van against a frictional force of 440 N.

a)

704 J

b)

520 J

c)

550 J

d)

625 J

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