Question

A body is projected at an angle of 60 with the vertical having momentum P. what will be the minimum momentum of this projectile during its flight?

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Answer 1

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At the highest point of projectile motion the final vertical velocity is zero.

∴P (vertical)=0

but, P (horizontal) =Pcos60 =P× 1/2

∴ the magnitude of momentum at the highest point is P/2

Hence,

The answer is P/2