Question

A man running on a horizontal road at 8 km/h finds the rain falling vertically. He increases his speed to 12 km/h and finds that the drops make angle 30°with the vertical. Find the speed and direction of the rain with respect to the road.​

Answer 1

Answer:

Here, two balls each of mass 0.25 kg are moving towards each other than in a straight line, one at 3ms

−1

and the other at 1ms

−1

collide and the balls stick together after the collision, hence

m

1

u

1

−m

2

u

2

=(m

1

+m

2

)v

(0.25)(3)−(0.25)(1)=(0.25+0.25)v

(0.75)−(0.25)=(0.5)v

v=1ms

−1

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