Question

A man is standing on ground with an ambrella hat , rain fall starts at a speed of VR=20m/s at an angle of 30° with respect to the vertical.find the speed and direction in which the man should start running so as to protect himself from getting wet.

Answer 1

The man can protect himself from getting wet if he runs such that the component of VR along horizontal can be cancelled.

So if a man runs at a speed of Vr Sin 30 he can protect himself.

Required velocity is 10 m/s in the direction of inclination of rain.

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