A ball is thrown vertically upwards from the ground with an initial velocity of 50ms-1....

WAEC 1988

A ball is thrown vertically upwards from the ground with an initial velocity of 50ms^-1. What is the total time spent by the ball in the air? (g = 10ms^-2)

A. 2.5s
B. 5.0s
C. 10.0s
D. 15.0s
E. 20.0s

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Correct Answer: Option C

Explanation

Time to move up:

V = U - gt
0 = 50 - 10t
t = 5.

Total time spent on air = 2t = 10.0s

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A ball is thrown vertically upwards from the ground with an initial velocity of 50ms-1....

Correct Answer: Option C

Explanation

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