Question1
An automobile having a mass of 1,000 kg is driven into a brick wall in a safety test. The bumper behaves like a spring with constant 5.95 106 N/m and is condensed 3.53 cm as the car is brought to rest. What was the speed of the car before impact; assume no energy is lost in the collision with the wall?
Question2
A glaucous-winged gull, ascending straight upward at 5.00 m/s drops a shell when it is 14.0 m above the ground.
(a) What is magnitude and direction of the shell's acceleration just after it is released?
(b) Discover the maximum height above the ground reached by the shell.
(c) How long does it take for the shell to reach the ground?
(d) What is the speed of the shell at this time?