An object of mass m1 5 9.00 kg is in equilibrium whenconnected to a light spring of

Chapter 15, Problem 85

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An object of mass m1 5 9.00 kg is in equilibrium whenconnected to a light spring of constant k 5 100 N/mthat is fastened to a wall as shown in Figure P15.85a.A second object, m2 5 7.00 kg, is slowly pushed upagainst m1, compressing the spring by the amount A 50.200 m (see Fig. P15.85b). The system is then released,and both objects start moving to the right on the frictionlesssurface. (a) When m1 reaches the equilibriumpoint, m2 loses contact with m1 (see Fig. P15.85c) andmoves to the right with speed v. Determine the value ofv. (b) How far apart are the objects when the spring isfully stretched for the first time (the distance D in Fig.P15.85d)?

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