A projectile is projected with a linear momentum p making an angle θ with the horizontal. The change in momentum of the projectile on return to the ground will be
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a
2 p
b
2pcosθ
c
2psinθ
d
2ptanθ
answer is C.
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Detailed Solution
The angle made by the projectile with horizontal on return to the earth is −θ. HenceΔp=[ipcosθ+jpsinθ] −[ipcos(−θ)+jpsin(−θ)]=j2psinθ
A projectile is projected with a linear momentum p making an angle θ with the horizontal. The change in momentum of the projectile on return to the ground will be