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Chapter 5 Newton’s Third Law of MotionReview QuestionsForces and Interactions1. When you push against a wall with your fingers, they bend because they experience a force. Identify this force.2. A boxer can hit a heavy bag with great force. Why can’t he hit a piece of tissue paper in midair with the same amount of force?3. How many forces are required for an interaction?4. State Newton’s third law of motion.5. Consider hitting a baseball with a bat. If we call the force on the bat against the ball the action force, identify the reaction force.6. Consider the apple and the orange (Figure 5.9). If the system is considered to be only the orange, is there a net force on the system when the apple pulls?
7. If the system is considered to be the apple and the orange together (Figure 5.10), is there a net force on the system when the apple pulls (ignoring friction with the floor)?8. To produce a net force on a system, must there be an externally applied net force?