Four inelastic cables are attached to a 2-lb plate P. They hold the 15 in-long spring A 3in. in compression when no weight is on the plate. In addition, there is an un-deformed spring B nested within this compressed spring. If the Block C, having a weight of 10 lb, is initially pushed downward such that the plate is 7 in from the surface, determine the maximum height to which the block will rise when released from this position. (Ka = 150 lb/ft and Kb = 300 lb/ft)

An athlete swings a ball, connected to the end of a chain, in a horizontal circle. the athlete is able to rotate the ball at the rate of 8.13 rev/s when the length of the chain is 0.600 m. when he increases the length to 0.900 m, he is able to rotate the ball only 6.04 rev/s. (a) which rate of rotation gives the greater speed for the ball? 6.04 rev/s 8.13 rev/s (b) what is the centripetal acceleration of the ball at 8.13 rev/s? m/s2 (c) what is the centripetal acceleration at 6.04 rev/s? m/s2