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A 20-lb block is attached to spring A and connected to spring B by a cord and pulley. The block is held in the position shown with both springs un-stretched
A 2.9-lb force P is applied to the lever which controls the auger of a snow blower. Determine the value of a knowing that the moment of P
A 2.5-lb collar is attached to a spring and slides without friction along a circular rod in a vertical plane. The spring has an undeformed length of 4 in
A 2.5-lb block B is moving with a velocity v0 of magnitude v0 = 6 ft/s as it hits the 1.5-lb sphere A, which is at rest and hanging from a cord attached at O.
A 200-kg flywheel is at rest when a constant 300 N · m couple M is applied at time t = 0. At t = 28s the flywheel reaches its rated speed of 2400 rpm
A 200-kg flywheel is at rest when a constant 300 N · m couple is applied. After executing 560 revolutions, the flywheel reaches its rated speed of 2400 rpm
A 120-kg satellite has a radius of gyration of 600 mm with respect to the y axis and is symmetrical with respect to the zx plane
A 12-lb block which can slide on a frictionless inclined surface is acted upon by a force P which varies in magnitude as shown
A 15-g magnet D is released from rest in the position shown, falls a distance of 320 mm, and becomes attached at A to the 200-g steel bar AB.
A 135-N vertical force P is applied at A to the bracket shown, which is held by screws at B and C.
A 120-lb pilot flies a jet trainer in a half vertical loop of 3600-ft radius so that the speed of the trainer decreases at a constant rate.
A 180-lb man and a 120-lb woman stand side by side at the same end of a 300-lb boat, ready to dive, each with a 16-ft/s velocity relative to the boat
A 16-kg triangular plate is supported by three wires as shown. Knowing that a = 150 mm, determine the tension in each wire. You must solve the given problem
A 2-kg block is supported by a spring of constant k = 128 N/m and a dashpot with a coefficient of viscous damping c = 0.6 N · s/m
A 2-kg ball revolves in a horizontal circle as shown at a constant speed of 1.5 m/s.
A 10-ton truck enters a 15° safety ramp at a high speed v0 and travels 540 ft in 5.5 s before its speed is reduced to v0/2.
A 10-lb uniform square plate is supported by two identical 3-lb uniform slender rods AD and BE. It is held in the position shown by rope CF.
A 10-lb rod of uniform cross section is used to form the shaft shown. Knowing that the shaft rotates with a constant angular velocity of magnitude 12 rad/s
A 0.2-lb model rocket is launched vertically from rest at time t = 0 with a constant thrust of 2 lb for one second and no thrust for t > 1 s.
A 0.7-kg ball that can slide on a horizontal frictionless surface is attached to a fixed point O by means of an elastic cord of constant nt k = 150 N/m
A 0.5-kg block B slides without friction inside a slot cut in arm OA which rotates in a vertical plane at a constant rate= 2 rad/s.
A 0.7-lb block rests on top of a 0.5-lb block supported by but not attached to a spring of constant 9 lb/ft. The upper block is suddenly removed.
A 1-kg collar C slides without friction along the rod OA and is attached to rod BC by a frictionless pin. The rods rotate in the horizontal plane
A 1.4-kg block is supported as shown by a spring of constant k = 400 N/m which can act in tension or compression.
A 1.25-oz bullet is fired with a horizontal velocity of 950 ft/s into the 18-lb wooden beam AB. The beam is suspended from a collar of negligible weight