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प्रश्न
What are the units of (a) work, and (b) energy?
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उत्तर
The units of work and energy are the same.
(a) Work - Joule (J)
(b) Energy - Joule (J)
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संबंधित प्रश्न
When do we say that work is done?
Is it possible that a force is acting on a body but still the work done is zero? Explain giving one example.
A boy throws a rubber ball vertically upwards. What type of work, positive or negative, is done : by the force applied by the boy?
(a) by the force applied by the boy?
(b) by the gravitational force of earth?
A boy tries to push a truck parked on the roadside. The truck does not move at all. Another boy pushes a bicycle. The bicycle moves through a certain distance. In which case was the work done more : on the trick or on the bicycle? Give a reason to support your answer.
The velocity of a car increases from 54 km/hr to 72 km/hr. How much is the work done if the mass of the car is 1500 kg?
Give two examples of couple actions in our daily life.
Why is less effort needed to lift a load over an inclined plane as compared to lifting the load directly?
State whether work is done or not, by writing yes or no, in the following case:
A boy climbs up 20 stairs.
