An apple of mass 200 g falls from a tree through a vertical distance h and reaches the ground with velocity v m/s due to air resistance. Work done by air resistance is :

Q: An apple of mass 200 g falls from a tree through a vertical distance h and reaches the ground with velocity v m/s due to air resistance. Work done by air resistance is :

(a) 0.1 (2gh – v2)

(b) 0.2 (2gh–v2)

(c) 0.2 (v2 – 2gh)

(d) 0.1(v2 – 2gh)

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Ans: (d)