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प्रश्न
Give an example
Chemical energy changes to heat energy.
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उत्तर
Candle flame
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संबंधित प्रश्न
A pair of bullocks exerts a force of 140 N on a plough. The field being ploughed is 15 m long. How much work is done in ploughing the length of the field?
Define work.
A machine raises a load of 750 N through a height of 16 m in 5 s. calculate:
- energy spent by machine,
- power at which the machine works.
A car is being driven by a force of 2.5 ✕ 1010 N. Travelling at a constant speed of 5 m/s, it takes 2 minutes to reach a certain place. Calculate the work done.
How much work is done when a force of 2 N moves a body through a distance of 10 cm in the direction of force?
The work done on an object does not depend on the :
Name the type of energy possessed by a
(i) stretched catapult (ii) hot iron
(iii) wound up clock
A is a push or a pull ______.
Look at the activity below. Reason out whether or not work is done in the light of your understanding of the term ‘work’.
A wind-mill is lifting water from a well.
