A girl standing on road holds her umbrella at 45 ° with the vertical to keep the rain away. If she starts running without umbrella with a speed of 15 2 km h - 1 , the rain drops hit her head verticall

Question

A girl standing on road holds her umbrella at 45 ° with the vertical to keep the rain away. If she starts running without umbrella with a speed of 15 2 km h - 1 , the rain drops hit her head vertically. The speed of rain drops with respect to the moving girl is

TestHub · Accepted Answer

v → r g = v → r - v → g From the above diagram, velocity of the raindrop wrt ground will be, v → r = 15 2 2 + 15 2 2 = 30 km h - 1 And velocity of the raindrop wrt the moving girl will be, v → r g = 15 2 = 30 2 km h - 1

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