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Instantaneous Force and Impulse

a girl of mas...

Question

a girl of mass 40kg jumps with a horizontal velocity of 5m/s onto a stationary cart with frictionless wheels. the mass of the cart is 3 kg. what is the velocity as the cart starts moving

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Solution

Dear Student

Conservation of momentum
Initial Momentum = Final momentum
40(5) + 5(0) = (40+5)v
200/45 = v
v = 4.44 m/s = Velocity of the cart and the girl included.

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