Motion in a Plane :: Discussion


5.. A body is projected horizontally from the top of a cliff with a velocity of 9.8m/s. What time elapses before horizontal and vertical velocities become equal? Take g = 9.8m/s2?
A.9.8s
B.0s
C.10s
D.1s
Answer:  Option  D
Explanation:

Horizontal velocity at any instant, vx = u = 9.8m/s

Vertical velocity at any instant, vy = 0 + gt = 9.8t

9.8 = 9.8t

t = 1s.

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Published by:Michael Daani

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