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A 2-kg ball revolves in a horizontal circle as shown at a constant speed of 1.5 m/s.
A 1.5-kg block A rests on a 1.5-kg block B and is attached to a spring of constant 180 N/m. The coefficients of friction between the two blocks
A 10-kg uniform disk is placed in contact with an inclined surface and a constant couple M is applied as shown
A 10-kg block can be supported in the three different ways shown, knowing that the pulleys have a 100-mm radius, determine the reaction at A in each case
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 1.2* 2.4 m sheet of plywood is temporarily held by nails at D and E and by two wooden braces nailed at A, B, and C.
A 10-lb block, attached to the lower end of a spring whose upper end is fixed, vibrates with a period of 6.8 s.
A 10° wedge is forced under an 80-kg cylinder as shown. Knowing that the coefficient of static friction between the cylinder and the vertical wall
A 0.7-kg sphere A and a 0.5-kg sphere C are attached to the ends of a 1-kg rod AC which can rotate in a vertical plane about an axis at B.
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 0.6-lb collar A is released from rest, slides down a frictionless rod, and strikes a 1.8-lb collar B which is at rest and supported by a spring of constant 34
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 0.9-kg block B is connected by a cord to a 2.4-kg block A which is suspended as shown from two springs, each of constant 180 k = N/m, and a dashpot of damping
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
A 1.2-lb ball A is moving with a velocity vA of magnitude vA = 24 ft/s when it is struck by a 2.4-lb ball B which has a velocity vB
A 1.2-kg uniform rod AB is attached to a hinge at A and to two springs, each of constant 450 k = N/m.
A 1.1-kg ball A is falling vertically with a velocity of magnitude vA = 2.5 m/s when it is hit as shown by a 0.7-kg ball B which has a velocity of magnitude vB
Further show, assuming Ix > Iy > Iz, that the polhodes obtained for various values of O H have the shapes indicated in the figure.
A 0.05-lb bullet is fired with a horizontal velocity of magnitude 1500ft/s into the lower end of a 40-lb slender bar which is initially at rest in a vertical