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Rain is falling vertically witha speed of 35 m st, Winds starts blowingafter sometime with a speed of 12 m/sI ineast to west direction. In which directionshould a boy waiting at a bus stop holdhis umbrella ? |
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Answer» The drops which are falling a little ahead of the current position of the man, will fall on him, because he moves in that direction. relative velocity of the rain drops wrt cyclist = velocity of woman - velocity of rain the magnitude of relative velocity the rain drops wrt man = √(12² + 35²) = 37 m/s direction of relative velocity of the rain drops = = tan⁻¹ (12/35) = 18.92 deg. from the vertical. So the boy should hold the umbrella at 18.92 deg to the vertical in the forward direction. |
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