Q. A 25g ball is fired with an initial speed v1 toward a 150g ball that is hanging motionless from a 1.30m string. The balls have a perfectly elastic collision. As a result, 150 g ball swings out until the string makes an angle of 37° with vertical. What was v1?
Q. A fighter pilot flying with a speed of 500•m/s (about Mach 1.5) makes a turn with a radius of 5250•m. What centripetal acceleration does pilot experience? Express your answer in g's (multiples of 10•m/s2).