Work , energy and power questions | form one Physics

A stone of mass 500 g is lifted through a height of 2 m. The energy possessed by the stone is known as:
A. chemical energy
B. kinetic energy
C. mechanical energy
D. potential energy.

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UNSOLVED

Work and energy have the same SI unit called:
A. calorie
B. joule
C. pascal
D. watt.

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UNSOLVED

1. What is energy?
2. State the principle of conservation of energy.
3. A motor exerts a horizontal force of 200 N in pulling a box 10 m across a level floor. How much work did the motor do?

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UNSOLVED

An object of 100 kg is lifted to a height of 5 m above the ground in 3 seconds. Calculate its:
(i) Work done
(ii) Power

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UNSOLVED

A boy weighing 45kg climbs up a stair case to height of 7 m in 5 seconds. The amount of work done by the boy:
A. 70J
B. 105J
C. 450J
D. 315J

Answer / Solution

UNSOLVED