A ball is dropped from the top of a building. The ball takes 0.5s to fall past the 3m length of a window at certain distance…..

Q. A ball is dropped from the top of a building. The ball takes 0.5s to fall past the 3m length of a window at certain distance from the top of the building. Speed of the ball as it crosses the top edge of the window is (g = 10 m/s2)

(a) 3.5 ms-1

(b) 8.5 ms-1

(c) 5 ms-1

(d) 12 ms-1

Ans: (a)

Author: Rajesh Jha

QuantumStudy.com

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