Question

A man holds an umbrella at ${30}^{\circ }$ vertically to keep himself dry. She, then, runs at a speed of $10m{s}^{-1}$ and finds the raindrops to be hitting vertically. Speed of the raindrops w.r.t. man and w.r.t. earth are

• A. $20m{s}^{-1},10m{s}^{-1}$
• B. $10m{s}^{-1},10m{s}^{-1}$
• C. $10\sqrt{3}m{s}^{-1},20m{s}^{-1}$
• D. $10m{s}^{-1},20\sqrt{3}m{s}^{-1}$

Answer 1

The correct option is C $10\sqrt{3}m{s}^{-1},20m{s}^{-1}$

Velocity of man |vm→|=10ms−1|vm→|=10ms−1