(3) A 8 lb collar is released from rest in the position shown, slides down the inclined rod, and compresses the spring. The direction of motion is reversed and the collar slides up the rod. Knowing that the maximum deflection of the spring is 6 in., determine 18 in.- (a) the coefficient of kinetic friction between the collar and the rod, 30° (b) the maximum speed of the collar. k= 60 lb/ft

Problem 12.F11 Disk A rotates in a horizontal plane about a vertical axis at the constant rate. Slider B has a mass m and moves in a frictionless slot cut in the disk. The slider is attached to a spring of constant k, which is undeformed when r = 0. Knowing that the slider is released with no radial velocity in the position r=ro, draw a FBD and KD at an arbitrary distance r from O. Spring Fig. P12.F11 60

A 74 g ball B dropped from a height ho=1.9 m reaches a height h₂= 0.25 m after bouncing twice from identical 250-g plates. Plate A rests directly on hard ground, while plate Crests on a foam-rubber mat. ho B hy Determine the height h1 of the ball's first bounce. The height h1 of the ball's first bounce is m.

A spring is used to stop a 50-kg package which is moving down a 20° incline. The spring has a constant k =34 kN/m and is held by cables so that it is initially compressed 50 mm. Knowing that the velocity of the package is 2 m/s when it is 8 m from the spring and neglecting friction, determine the maximum additional deformation of the spring in bringing the package to rest. Assume that the kinetic coefficient of friction between the package and the incline is 0.2. 2 m/s 50 kg 8m Cable 20° The maximum additional deformation of the spring in bringing the package to rest is 0.574 x m.