# 1. A 130 kg tackier moving at 2.5 m/s meets head on (and tackles) an 82 kg halfback moving at 5.0…

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.

FIGURE 9-37