Q1. A 144 ball on a 60 long string is swung in a vertical circle about a point 200 above the floor. The tension in the string when the ball is at the very bottom of the circle is 6.8. At the very bottom of the circle, a very sharp knife is suddenly inserted to cut the string directly below the point of support. How far to the right of where the string was cut does the ball hit the floor?

Q2. 50 g ball travelling at 25.0 m/s is bounced off a brick wall and rebounds at 22.0m/s. A high-speed camera records this event. If the ball is in contact with the wall for 3.51 ms, what is the average acceleration of the ball throughout this time interval?