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NEET 2008 Physics question

PhysicsMotion in a PlaneNEET 2008

A particle of mass is projected with velocity making an angle of with the horizontal. When the particle lands on the level ground the magnitude of the change in its momentum will be

Answer: (4)

Solution

Take horizontal as and vertical as . Initial momentum: . On landing at the same level the speed is the same, but the vertical component reverses: . Change in momentum , so

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Question ID VK-089940