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प्रश्न
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उत्तर
'Work' is said to be done when the applied force makes the body move i.e., there is a displacement of body.
It is equal to the product of force and the displacement of the point of application of the force in the direction of force.
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संबंधित प्रश्न
Define 1 joule of energy.
State the energy transformation on the following:
Electricity is obtained from solar energy.
When do we say that work is done? Write the formula for the work done by a body in moving up against gravity. Give the meaning of each symbol which occurs in it.
P, Q and R are three forces which act as shown in fig.
The point O lies in the same plane. Given, P = Q = R = 10N
(i) Which force has the least moment about O? Give a reason.
(ii)Which force has the greatest moment about O? Give a reason.
What is the SI unit of work?
Name the physical quantity whose MKS units are kgm2s-3.
Name the physical quantity associated with the 'rate of doing work'.
How fast should a boy weighting 30 kg run so that his kinetic energy is 375 joule?
Name two places in India where electricity is generated from nuclear power plants.
