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If a man is moving with a speed of 3km/hr in east direction then the rain appears to him normally and when he increases his speed to 6km/hr in the same direction then the rain appears to him with an angle of 30 degree with the normal.Then find out the velocity of rain

If a man is moving with a speed of 3km/hr in east direction then the rain appears to him normally and when he increases his speed to 6km/hr in the same direction then the rain appears to him with an angle of 30 degree with the normal.Then find out the velocity of rain

Grade:11

1 Answers

Arun
25750 Points
5 years ago
the rain's horizontal velocity must be equal to the man's if a he sees the rain going straight down relative to the ground.

v - velocity of rain along x axis (velocity of rain when it falls vertically or velocity of rain relative to ground)
vm  -  velocity of man 

6 = Vm = V sin (theta) 
V = 6 * sin(30) =  3 m/s  

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