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Q1. A 52.5 g Super Ball travelling at 30 m/s bounces off a brick wall and rebounds at 16.0 m/s. A high-speed camera records this event. If the ball is in contact with wall for 3.25 ms, what is the magnitude of the average acceleration of ball during this time interval?

Q2. A small metal bead, labelled A, has a charge of 27. It is touched to metal bead B, initially neutral, so that the two beads share the 27 charge, but not necessarily equally. When the two beads are then placed 5.0 apart, the force between them is 5.3×10-4. Suppose that A has a greater charge. What is the charge and on beads?

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