Chapter 15, Problem 91P

The 4-kg box slides on the smooth surface and has a velocity of 15 m/s. If it strikes the smooth plate, which has a weight of 2 kg and is held in position by an unstretched spring of stiffness k = 600 N/m, determine the maximum compression imparted to the spring. Take e = 0.7 between the box and the plate.

The collar with mass of 0.9 kg is released from rest at position A and travels down the smooth circular rod in the vertical plane. The spring has a stiffness of k = 145 N and an unstretched length of 0.5 meters. Consider R = 2.0 meters, 0 = 23°, and g = 10 m. Determine the work done by the weight of the collar (in Joules) during the motion from point A to point C. A m R/2 D В C

The 12-lb box slides on the surface for which μk = 0.3. The box has a velocity v = 15 ft/s when it is 2 ft from the plate.  a) If the box strikes the smooth plate, which has a weight of 22 lb and is held in position by an unstretched spring of stiffness k = 440 lb/ft, determine the maximum compression imparted to the spring. Take e = 0.8 between the box and the plate. Assume that the plate slides smoothly. x = ?

The steel ingot has a mass of 1940 kg. It travels along the conveyor at a speed v= 0,2 m/s when it collides with the "nested" spring assembly. If the stiffness of the outer spring is Ka= 5 kN/m, determine the required stiffness Kb of the inner spring so that the motion of the ingot is stopped at the moment the front, C, of the ingot is 0.3 m from the wall. (Answer in kN/m) 0.5 m -0.45 m kB k B

The collar has a mass of 28-kg and slides along the smooth rod. Two springs are attached to it and the ends of the rod as shown. S kA kB: 12 0.25 m Each spring has an uncompressed length of I1=2-m and l2=3-m and stiffnesses k1=51-N/m and k2=176-N/m respectively. Determine the velocity that must be subjected to the collar to generate a compression of 0.7 m

The 6-lb box slides on the surface for which u: = 0.3. The box has a velocity v = 15 ft /s when it is 2 ft from the plate. v = 15 ft /s 2 ft Part A If the box strikes the smooth plate, which has a weight of 23 lb and is held in position by an unstretched spring of stiffness k = 340 lb /ft, determine the maximum compression imparted to the spring. Take e = 0.8 between the box and the plate. Assume that the plate slides smoothly. Express your answer using three significant figures and include the appropriate units. ANSWER: x =

Please do it fast

The 4-lb collar C fits closely the smooth shaft. The spring in unstretched when s=0 and its stiffness is 6 lb/ft. AT s=0 ft, the collar is given a velocity of 19ft.s-1. The height is 0.6-ft. determine the position of the collar when its velocity is 0 ft.s-1

The 3-kg ball is thrown at the suspended 39-kg block with a velocity of 8 m/s. If the time of impact between the ball and the block is 0.004s, determine the average normal force exerted on the block during this time. Take e = 0.7. Express your answer in kN. B