Impulse of a constant force

         

A 66 kg66\text{ kg} stuntman jumps out of a window that's 5 m5\text{ m} above the ground. When he hits the ground, the impulse time between him and the ground is 2 s.2\text{ s}. What is the average force delivered to the man by the ground during the impulse?

Ignore any air resistance, and assume that gravitational acceleration is g=10 m/s2.g=10\text{ m/s}^2.

An object of mass 0.5 kg,0.5\text{ kg}, initially at rest, acquires a speed of 2 m/s2\text{ m/s} after being pushed by a constant force F.F. If the impact time is 25 ms,25\text{ ms}, what is the magnitude of F?F?

An object of mass mm traveling horizontally with velocity vv strikes a massive vertical wall and rebounds back along its original direction with no change in speed. If the impulse time is 2 ms,2\text{ ms}, what is the magnitude of the force delivered by the wall to the object?

A man playing pocket-ball strikes the white ball with mass 0.5 kg,0.5\text{ kg}, and the ball gets a launch speed of 10 m/s.10\text{ m/s}. If the strike delivered a constant force of magnitude 25 N,25\text{ N}, what is the impulse time?

A ball of mass 1 kg1\text{ kg} is dropped straight downward from a 20 m20\text{ m} high rooftop. After the ball hits the ground, it bounces back in the air up to 5 m,5\text{ m}, and then starts to fall again. If the impact time between the ball and the ground is 50 ms,50\text{ ms}, what is the magnitude of the average force exerted by the ground on the ball?

Ignore any air resistance, and assume that gravitational acceleration is g=10 m/s2.g=10\text{ m/s}^2.

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