A tractor of mass 5.0*10^3kg is used to tow a car of mass 2.5*10^3kg.the tractor moved with a speed of 3.0m/s^1 just before the towing rope became taut.calculate:the speed of the tractor immediately the rope became taut, loose kinetic energy of the system just after the car has started moving and the impulse in the rope when it jerk the car into motion.
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A ball of mass 5.0kg hit a smoth vertical wall normally with the same speed of 2m\s and respond with the same speed.Determine the impulse exprienced by the ball
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