Suhindar

You have a 0.35 long pendulum attached to the roof inside your car. Your car is travelling at a speed of 1.0 m/s when it hits a concrete wall and stops immediately. If the pendulum is free to swing, to what maximum angle to the vertical does the pendulum...

a rollar coaster travelled without friction. If the speed of the rollar coaster at 15 m is 3 m/s, what is the speed at 7 m/s?