1. A 130 kg tackier moving at 2.5 m/s meets
head on (and tackles) an 82 kg halfback moving at 5.0 m/s. What will be their
mutual speed immediately after the collision?
2. A child in a boat throws a 5.70 kg
package out horizontally with a speed of 10.0 m/s, Fig. 9-37. Calculate the
velocity of the boat immediately after, assuming it was initially at rest. The
mass of the child is 24.0 kg and that of the boat is 35.0kg.