Question

6.
4)4
Aman running on a horizontal road at 8 ms -1 finds rain falling vertically. If he increases his speed to
12m51, he finds that drops make
30° angle with the vertical. Find the velocity of rain with respect to
the road.
1) 477 ms -1 2) 872 ms
3) 7/3 ms'
4) 8 ms-1
28​

Answer 1

Explanation:

This shows that the horizontal component of rain =8km/hr as the relative velocity of the rain has only a vertical component with respect the man.

Vx=8km/hr

2nd case =VRM =VR - VM = (8-Vy)-12

= -4-Vy

tan 30degree = 4/Vy

1/3= 4/y

Vy=4in root 3 km/hr

velocity of rain = 8km/hr -4in root 3km/hr

tan a =2/3 from the vertical

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