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5 December, 18:52

To a stationary man rain is falling on his back with

a velocity 6 km/h at an angle 30' with vertical. To

make the rain velocity appear vertical the man

should move

(1) Forward with a velocity 3 km/h

(2) Forward with a velocity 3/3 km/h

(3) Backward with a velocity 3 km/h

(4) Forward with a velocity 213 km/h

- from the ground.

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Answers (1)
  1. 5 December, 19:34
    0
    (1) Forward with a velocity 3 km/h

    Explanation:

    To make the rain vertical with respect to the man, the man must match the horizontal component of the rain.

    v = 6 sin 30°

    v = 3

    The man must run forward at 3 km/h.
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