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प्रश्न
Work is said to be done by a forte only when ................
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उत्तर
Work is said to be done by a forte only when the body moves.
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संबंधित प्रश्न
Explain briefly why the work done by a fielder when he takes a catch in a cricket match is negative.
No work is done by a force if the body
State the S.I. unit of work and define it.
It takes 20 s for a person A of mass 50 kg to climb up the stairs, while another person B does the same in 15 s. Compare the work done.
Give one example each in which a force does (a) positive work (b) negative work, and (c) zero work.
An electric motor drives a machine which lifts a mass of 4 kg through a height of 10 m in 5 s at a constant speed. Assuming g = 10 ms-2, calculate
(i) the amount of work done, (ii) the power of the machine.
A man climbs a slope and another walks same distance on level road. Which of the two expends more energy and why?
If a ball is dropped on the sloping roof of a house, it acquires ______ and falls on the ground. That is the transformation of ______ energy into ______ energy takes place.
(kinetic, potential, motion)
