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A load of lumber weighing W = 25 kN is being raised as shown by a mobile crane. Knowing that the tension is 25kN in all portions of cable AEF and that the
A minivan is tested for acceleration and braking. In the street-start acceleration test, elapsed time is 8.2 s for a velocity increase from 10 km/h to 100 km/h
A marker for a garden path consists of a truncated regular pyramid carved from stone of density 2570 kg/m3. The pyramid is mounted on a steel base of thickness
A machine element is supported by springs and is connected to a dashpot as shown. Show that if a periodic force of magnitude P = Pm sin ?ft is applied
A homogeneous disk of mass m is connected at A and B to a fork-ended shaft of negligible mass which is supported by a bearing at C
A homogeneous disk of radius 9 in. is welded to a rod AG of length 18 in. and of negligible weight which is supported by a ball and socket at A.
A homogeneous sphere S, a uniform cylinder C, and a thin pipe P are in contact when they are released from rest on the incline shown.
A homogeneous rod of weight per unit length equal to 0.3 lb/ft is used to form the assembly shown, which rotates freely about pivot A in a vertical plane
A homogeneous wire with a mass per unit length of 1.8 kg/m is used to form the figure shown. Determine the mass products of inertia Ixy, Iyz, and Izx
A horizontal circular plate is suspended as shown from three wires which are attached to a support at D and that form 30° angles with the vertical.
A hemisphere of mass m and radius r is released from rest in the position shown. Knowing that the hemisphere rolls without slipping
A hemisphere of weight W and radius r is released from rest in the position shown. Determine
A hawser is wrapped two full turns around a bollard. By exerting a 320-N force on the free end of the hawser, a dockworker can resist a force of 20kN
A handball player throws a ball from A with a horizontal velocity v0. Knowing that d = 15 ft, determine
A helicopter is flying with a constant horizontal velocity of 90 mi/h and is directly above point A when a loose part begins to fall
A freshwater marsh is drained to the ocean through an automatic tide gate that is 4 ft wide and 3 ft high. The gate is held by hinges located along its top edge
A framing anchor is formed from 2-mm-thick galvanized steel. Determine the mass moment of inertia of the anchor with respect to each of the coordinate axes.
A force P of magnitude 160 N is applied to a man's hand as shown. Replace P with an equivalent force-couple system
A grade beam AB supports three concentrated loads and rests on soil and the top of a large rock. The soil exerts an upward distributed load, and the rock exerts
A golfer hits a ball with an initial velocity of magnitude v0 at an angle a with the horizontal. Knowing that the ball must clear the tops of two trees
A golfer aims his shot to clear the top of a tree by a distance h at the peak of the trajectory and to miss the pond on the opposite side.
A gardener wishes to connect a water supply pipe from point C on the foundation of a 30-ft-long greenhouse to a water main that passes through points A and B.
A half section of a uniform thin pipe of mass m is at rest when a force P is applied as shown
A half section of a uniform cylinder of radius r and mass m rests on two casters A and B, each of which is a uniform cylinder of radius r/4 and mass m/8
A half cylinder of mass m is released from rest in the position shown and swings freely about the horizontal diameter AB.