A ball is projected at an angle 60 ° with the horizontal with speed 30 m / s . What will be the speed of the ball when it makes an angle 45 ° with the horizontal?

Question

A ball is projected at an angle 60 ° with the horizontal with speed 30 m / s . What will be the speed of the ball when it makes an angle 45 ° with the horizontal?, 30 m / s, 15 2 m / s, 15 2 m / s, 30 2 m / s

MARKS App · Accepted Answer

Horizontal velocity remains same 30 ° cos 60 ° = vcos 45 ° ⇒ v = 15 2 m / s

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