A boy holds one end of a rope of length l and the other end is fixed to a thin pole of radius r. Keeping the rope taut, the boy goes around the pole causing the rope to get wound around the pole. Each round takes 10 s. What is the speed with which the boy approaches the pole?
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The boy should approach the pole with speed πr /5.
Step-by-step explanation:
Distance covered in one round = 2πr
Time taken to cover each round = 10 s
The formula is given below.
Speed = Distance / Time
= 2πr / 10 s
= πr /5
The boy should approach the pole with speed πr /5.
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