A body of mass 500g moving with 10ms^-1 increases to 20ms^-1

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1

A body of mass 500g moving with 10ms-1 increases to 20ms-1 when acted upon a force. Find
(i) the change on Kinetic Energy
(ii) the work done by the force
(iii) name the theorem based on the same

2

(i) Change in kintic energy = (1/2)mvf2 - (1/2)mvi2 = (1/2)×0.5×( 202 - 102 ) = 300 J
(ii) Workdone by the force = 300 J
(iii) Theorem used is " Work-Energy Theorem "