A body of mass 1 ~kg of thrown upwards with a velocity 20 ~m / s . It momenetarily comes to rest after attaining a height of 18 ~m . How much energy is lost due to air friction ? ( g =10 ~m / s ^2 )

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Quantrex Academy · Accepted Answer

Correct answer: B. 20 ~J

Loss of energy = 1 2 mv ^2- mgh =20 ~J

A body of mass 1 ~kg of thrown upwards with a velocity 20 ~m / s . It momenetarily comes to rest after attaining a height of 18 ~m . How much energy is lost due to air friction ? ( g =10 ~m / s ^2 )

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