A body of mass 1 kg is thrown upward and velocity 20m/s if momentum comeb to rest after attaining height 18 m how much energy lost due to air firction
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Energy At Initial is = 1/2*m*v² + mgh
= 1/2*1*20² + 1*10*0
= 200 J
Energy At Final is = 1/2*m*v² + mgh
= 1/2*1*0² + 1*10*18
= 180 J
Energy Lost = Energy at Initial - Energy at Final
= 200 - 180
= 20 J
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