A ball is thrown with an initial horizontal velocity of 30 m/s from a height of 3m above the ground and 40m from a vertical wall. How far from the wall will the ball rebound for the first time?

Q15. A 0.5 kg block slides along a horizontal frictionless surface at 2.5m/s. It is brought to rest by compressing a spring of spring constant 100N/m. The maximum spring compression (in cm) is:

A car’s bumper is designed to withstand a 4.0-km/h (1.1-m/s) collision with an immovable object without damage to the body of the car. The bumper cushions the shock by absorbing the force over a distance. Calculate the magnitude of the average force on a bumper that collapses 0.200 m while bringing a 900-kg car to rest from an initial speed of 1.1 m/s.

A car’s bumper is designed to withstand a 25.65 m/s collision with an immovable object without damage to the body of the car. The bumper cushions the shock by absorbing the force over a distance. Calculate the magnitude of the average force (in unit of N) on a bumper that collapses 0.12 m while bringing a 1,775.97-kg car to rest from an initial speed of 25.65 m/s. Your answer could be a large number between several thousands to hundreds of thousands. Just put in the raw number, for example, 123456.7