Example 6: During a game of pool, a collision occurs in which the 6-ball runs into the 8-ball. The 8 force diagram for the 8-ball at a moment during this collision is Force exerted on 8-ball by 6-ball shown here. Which of the force diagrams below would be appropriate for the 6-ball at the same moment in time? A B Force exerted on 6-ball by 8-ball 6 6 C D Force exerted Force exerted on 6-ball by on 6-ball by 8-ball 8-ball 6