Boxes ?A? and ?B? are in contact on a horizontal, frictionless surface, as shown in Fig. Box ?A? has mass 20.0 kg and box ?B? has mass 5.0 kg. A horizontal force of 100 N is exerted on box ?A?. What is the magnitude of the force that box ?A? exerts on box ?B?? Figure:

Solution 23E Let us have a look at the following figure. The acceleration of the system is calculated as follows. Acceleration a = Force/(m + A ) B a = 100 N/(20.0 + 5.0) kg a = 100 N/25 kg a = 4 m/s 2 We can calculate...