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प्रश्न
Name the physical quantity associated with the 'rate of doing work'.
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उत्तर
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संबंधित प्रश्न
A body, when acted upon by a force of 10 kgf, moves to a distance 0.5 m in the direction of force. Find the work done by the force. Take 1 kgf = 10 N.
A boy of weight 40 kgf climbs up the 15 steps, each 15 cm high in 10 s and a girl of weight 20 kgf does the same in 5 s. Compare:
- the work done, and
- the power developed by them. Take g = 10 N kg-1.
State the SI unit of work.
Choose one or more correct alternatives.
Joule is the unit of ______.
- force
- work
- power
- energy
Write an expression for work done by a force depends?
Name the type of energy possessed by a
(i) stretched catapult (ii) hot iron
(iii) wound up clock
State the energy changes which take place when An electric bulb glows when it is connected to a source of electric current.
How much energy is gained by a box of mass 20 kg when a man, runs carrying the box with a speed of 3 m/s-1 to catch the bus?
What do you understand by the term energy? Is energy a scalar or vector? How is the energy possessed by a body measured?
