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A horizontal platform P is held by several rigid bars which are connected to a vertical wire. The period of oscillation of the platform is found to be 2.2 s
A horizontal circular plate weighing 62 lb is suspended as shown from three wires that are attached to a support D and that form 30° angles with the vertical.
A particle moves in a straight line with the velocity shown in the figure. Knowing that x = - 48 ft at t = 0, draw the a-t and x-t curves for 0
A light metal panel is welded to two short sleeves of l-in. inside diameter that can slide on a horizontal rod
The weight of the boom ABC and the combined weight of the truck and driver are as shown. Determine the reaction at each
A lopping pruner is used to cut a small branch at F. Handles AD and BE pivot about bolt B and blade AC pivots about fixed bolt A while bolt C can slide freely
A locking C-clamp is used to clamp two pieces of 1/4-in. steel plate. Determine the magnitude of the gripping forces produced when two 30-lb forces
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