Q.

A ball is projected with a velocity, 10   ms1 at an angle of  60º with the vertical direction. Its speed at the highest point of its trajectory will be 

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a

Zero

b

10   ms1

c

53   ms1

d

5   ms1

answer is B.

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Detailed Solution

With horizontal the angle is 30º speed at maximum height is 10 cos 30

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