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प्रश्न
Name the type of energy possessed by a
(i) stretched catapult (ii) hot iron
(iii) wound up clock
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उत्तर
(i) Potential energy
(ii) Heat energy
(iii) Potential energy
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संबंधित प्रश्न
When do we say that work is done?
When does a force perform work?
Fill in the blank with suitable word :
The work done on a body moving in a circular path is __________
A girl weighing 400 N climbs a vertical ladder. If the value of g be 10 m s−2, the work by her after climbing 2 m will be :
A boy does work when he pushes against a brick wall. (yes/no).
On what factors does the work done by a force depend?
List any six forms of energy and write a short note on each of them.
A girl of mass 40 kg runs a height of 80 stairs, each 25 cm high with a load of 20 kg on her head in 25 sec. If g is 10 m/s2, find:
(i) Gravitational force acting on the girl.
(ii) Work done by her.
(iii) Useful work done by her.
(iv) Her power in watt.
A is a push or a pull ______.
