A body of mass 'm' dropped from a height 'h' reaches the ground with a speed of 0.8 √(gh). The value of workdone by the air-friction is:

Work, Energy and Power: JEE Main 2021 Physics question

JEE Main 2021 · 1 Sep, Evening shift · Q8621

JEE Main 20211 Sep, Evening shiftPhysicsMediumWork, Energy and Power70× since 2002

A body of mass 'm' dropped from a height 'h' reaches the ground with a speed of 0.8

\sqrt {gh}

. The value of workdone by the air-friction is :

JEE Main 2021 · 1 Sep, Evening shift · Q8621

JEE Main 20211 Sep, Evening shiftPhysicsMediumWork, Energy and Power70× since 2002

A body of mass 'm' dropped from a height 'h' reaches the ground with a speed of 0.8

\sqrt {gh}

. The value of workdone by the air-friction is :