A ball of mass 12.0 kg is dropped from the roof of a 240 m tall building. It rea

Question

A ball of mass 12.0 kg is dropped from the roof of a 240 m tall building. It reaches its terminal velocity which is 28.0 m/s before finally hitting the ground below. Air resistance definitely cannot be neglected.
Calculate the amount of work done by air resistance. A ball of mass 12.0 kg is dropped from the roof of a 240 m tall building. It reaches its terminal velocity which is 28.0 m/s before finally hitting the ground below. Air resistance definitely cannot be neglected.
Calculate the amount of work done by air resistance.
Calculate the amount of work done by air resistance. Calculate the amount of work done by air resistance.

Explanation / Answer

Here ,

the amount of work done by the air resistance is Wa

Using work energy theorum

12 * 9.8 * 240 + Wf = 0.5 * 12 * 28^2

solving for Wf

Wf = -23520 J

the work done by air resistance is -23520 J

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