First slide

Second law

Question

A ball is thrown up at an angle with the horizontal. Then the total change of momentum by the instant it returns to ground is :

Easy

A

acceleration due to gravity x total time of flight
B

weight of the ball x half the time of flight
C

weight of the ball x total time of flight
D

weight of the ball x horizontal range

Solution

By impulse momentum theorem $Δp = FΔt =$ weight of the ball x total time of flight.

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