Question

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.​

Answer 1

(1) Forward with a velocity 3 km/h

Step-by-step 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.