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Form 3: Chapter 7
Energy and Power
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Match the following statements correctly.
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3 points
Work
Energy
Power
Ability to do work
Product of force and displacement in the direction of force
Rate of doing work
Work
Energy
Power
Ability to do work
Product of force and displacement in the direction of force
Rate of doing work
The work done to lift up an object until a certain height from the surface of the Earth.
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1 point
Kinetic energy
Elastic potential energy
Gravitational potential energy
The energy owned by a moving object.
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1 point
Kinetic energy
Elastic potential energy
Gravitational potential energy
The energy possessed by an elastic object which is compressed or stretched.
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1 point
Kinetic energy
Elastic potential energy
Gravitational potential energy
A lady rode a lift from the first floor to the fifth floor.
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1 point
Work is done.
Work is not done.
A lady holds the bag and waits for the lift while standing.
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1 point
Work is done.
Work is not done.
A lady rode a lift from the sixth floor to the second floor.
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1 point
Work is done.
Work is not done.
Which of the following is the principle of conservation of energy?
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1 point
Loss of energy
Energy can be created.
Energy cannot be destroyed.
What is the potential energy when a 0.5 kg of box is placed at a height of 4m?
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1 point
20 J
50 J
30 J
60 J
Azlan pushes a trolley through a distance of 50 m. Calculate the force exerted by Azlan if the work done is 2250 J.
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1 point
20 N
35 N
45 N
50 N
Safuan lifted a box onto a table with the height 1.2 meter in 3 seconds. The mass of the box is 4 kg. Calculate the power produced by Safuan.
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1 point
8 W
16 W
20 W
32 W
The original length of a spring is 20 cm. A ball is compressed against the spring with a force of 25 N. The length of the spring now is 14 cm. Calculate the elastic potential energy stored in the spring.
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1 point
0.50 J
0.75 J
1.25 J
1.50 J
Box P with a mass of 40 kg is lifted to a height of 6 m. Box Q with a mass of 25 kg is lifted to a height of 14 m. Which box, P or Q, has larger gravitational potential energy?
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1 point
P
Q
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