alleryA ball is thrown straight up at 20 m/s. Taking g as 10 m/s squared, what maximum height does it reach?
A10 m
B40 m
C30 m
D20 m
Answer & Solution
Correct answer: D. 20 m
At the top v = 0, so h = u squared / 2g = 400 / 20 = 20 m.
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