By calculating numerical quantities for a multiparticle system, one can get a concrete sense of the meaning of the relationships p with arrowsys = Mtotv with arrowCM and Ktot = Ktrans + Krel. Consider an object consisting of two balls connected by a spring, whose stiffness is 570 N/m. The object has been thrown through the air and is rotating and vibrating as it moves. At a particular instant the spring is stretched 0.37 m, and the two balls at the ends of the spring have the following masses and velocities:

• 1: 7 kg, ‹ 6, 12, 0 › m/s

• 2: 4 kg, ‹ −4, 8, 0 › m/s

(a) For this system, calculate p with arrowsys =