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प्रश्न
उत्तर
The energy of a body is its capacity to do work.
The SI unit of work is 'joules' and the CGS unit is 'erg'.
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संबंधित प्रश्न
Why is a jack screw provided with a long arm?
No work is done by a force if the body
Define 1 joule of energy.
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.
Fill in the blank with suitable word :
The work done on a body moving in a circular path is __________
How much work is done by the gravitational force of earth acting on a satellite moving around it in a circular path? Give reason for your answer.
In case of negative work, the angle between the force and displacement is :
What is the work done when the object acted upon by a force remains at rest?
Can work done be zero even if force acts on the body?
A body does 20 J of work in 10 s. What is its power?
State the energy changes which take place when An electric bulb glows when it is connected to a source of electric current.
A body of mass 60 kg has the momentum 3000 kgm/s-1. Calculate: the speed of the body.
A force can cause an object to change its ______.
A car is accelerated on a levelled road and attains a velocity 4 times of its initial velocity. In this process the potential energy of the car
A force of F = (5y + 20) `hat"j"` N acts on a particle. The work done by this force when the particle is moved from y = 0 m to y = 10 m is ______ J.
State whether work is done or not, by writing yes or no, in the following case:
A boy climbs up 20 stairs.
