Q.

A ball is thrown vertically upward. [t has a speed of 10 m/sec when it has reached one half of its maximum height. How high does the ball rise ? (take g = 10 m/s2)

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a

15 m

b

5 m

c

10 m

d

20 m

answer is C.

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Detailed Solution

By using IIIrd equation of motion v2 = u2 + 2as
 

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02 =(10)2 + 2(-10)H2= H =10m

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