Two blocks of mass ma and mp, resting on a frictionless 234x 201hre connected by a stretched spring and then released (Fig. 7-48). (a) Is there a net external force on the system | before release? (b) Determine the ratio of their speeds, vA/VB . |(c) What is the ratio of their kinetic energies? (d) Describe |the motion of the CM of this system. Ignore mass of spring. mB FIGURE 7-48 Problem 83.

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