The wire in Figure P5.28 is frictionless between points A and B and rough between B and C. The 0.375 kg bead starts from rest at A. 5.00 m B 2.00 m Fig. P5.28 (a) Find its speed at B. m/s (b) If the bead comes to rest at C, find the loss in mechanical energy as it goes from B to C.