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A satellite completes one revolution around the earth at a height of in . The work done by the gravitational force of earth will be -
(a)
(b)
(c)
(d)

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Important Questions on Work, Energy and Power
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A particle is moved from (0, 0) t o (a, a) under a force from two paths. Path 1 is OP and path 2 is OQP. Let W1 and W2 be the work done by this force in these two paths. Then :

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A spring of force constant has an extension of . The work done in extending it from to is,

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If a spring extends by x on loading then energy stored by the spring is :- (T is tension in the spring, K = spring const.)

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A body of mass falls from a height of . What is the loss in potential energy?

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In stretching a spring by 2 cm energy stored is given by U, then stretching by 10 cm energy stored will be :-

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If the potential energy of two molecules is given by
, then at the equilibrium position, its potential energy is equal to

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A 2 g ball of glass is released from the edge of a hemispherical cup whose radius is 20 cm. How much work is done on the ball by the gravitational force during the ball’s motion to the bottom of the cup ?

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4 J of work is required to stretch a spring through 10 cm beyond its unstretched length. The extra work required to stretch it through additional 10 cm shall be :
