In Fig. 15.E11, the block P of weight 50 N is pulled so that the extension in the spring is 10 cm. The stiffness of the spring is 4 N/cm and the coefficient of friction between the block and the plane...

In Fig. 15.E11, the block P of weight 50 N is pulled so that the extension in the spring is 10 cm. The stiffness of the spring is 4 N/cm and the coefficient of friction between the block and the plane O-X is = 0.3. m Find the (a) velocity of the block as the spring returns to its undeformed state and (b) maximum compression in the spring.