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Dynamics Test - 2

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    A hockey stick pushes a ball at rest for 0.01 second with an average force of 50 N. If the ball weighs 0.2 kg, then the velocity of the ball just after being pushed is

    Solution

    If v m/sec. is the velocity of the ball just after being pushed, then 50 × 0.01 = 0.2 × v         [∵ Impulse = change of momentum]

    v = 2.5 m/sec.

     

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