The figure shows an overhead view of three identical particles on which external forces act. The magnitudes and directions of the forces on two of the particles are indicated. What are the magnitude and direction of the force acting on the third particle if the center of mass of the three-particle system is (a) stationary, (b) moving at a constant velocity rightward, and (c) accelerating rightward? 1 5 N 2 3N (a) center of mass is stationary (b) center of mass is moving at constant velocity rightward (c) center of mass is accelerating rightward

The figure shows an overhead view of three identical particles on which external forces act. The magnitudes and directions of the forces on two of the particles are indicated. What are the magnitude and direction of the force acting on the third particle if the center of mass of the three-particle system is (a) stationary, (b) moving at a constant velocity rightward, and (c) accelerating rightward? 1 5 N 2 3N (a) center of mass is stationary (b) center of mass is moving at constant velocity rightward (c) center of mass is accelerating rightward