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A piece of plywood in which several holes are being drilled successively has been secured to a workbench by means of two nails.
A projectile is launched from point A with an initial velocity v0 of 120 ft/s at an angle of 30° with the vertical.
A prismatically shaped gate placed at the end of a freshwater channel is supported by a pin and bracket at A and rests on a frictionless support at B.
A precast concrete wall section is temporarily held by two cables as shown. Knowing that the tensions in cables BD and FE are 900 N and 675 N
A player hits a 2-oz tennis ball with a horizontal initial velocity of 54 ft/s at a height of 4.5 ft. The ball bounces at point A and rises to a maximum height
A rectangular plate of mass m is falling with a velocity v0 and no angular velocity when its corner C strikes an obstruction
A recording tape passes over the 20-mm-radius drive drum B and under the idler drum C. Knowing that the coefficients of friction between the tape and the drums
A pump is located near the edge of the horizontal platform shown. The nozzle at A discharges water with an initial velocity of 25 ft/s at an angle of 55°
A pulley and two loads are connected by inextensible cords as shown. Load A has a constant acceleration of 10 in/s2 and an initial velocity of 8 in/s
A rocket has a mass of 1500kg, including 1200 kg of fuel, which is consumed at the rate of 15kg/s
A motorist is traveling on a curved portion of highway of radius 350 m at a speed of 72 km/h. The brakes are suddenly applied, causing the speed to decrease
A parachutist is in free fall at a rate of 180 ft/s when he opens his parachute at an altitude of 1900 ft. Following a rapid and constant deceleration
A packing crate of mass 40 kg must be moved to the left along the floor without tipping. Knowing that the coefficient of static friction
A package is at rest on a conveyor belt which is initially at rest. The belt is started and moves to the right for 1.5 s with a constant acceleration of 3.2 m/s
A nozzle discharges a stream of water in the direction shown with an initial velocity of 8 m/s. Determine the radius of curvature of the stream
A movable bracket is held at rest by a cable attached at C and by frictionless rollers at A and B. For the loading shown, determine
A particle moves in a straight line with a constant acceleration of -2 m/s2 for 6 s, zero acceleration for the next 4 s, and a constant acceleration of +2 m/s2
A jetliner is cruising at a speed of 900 km/h with each of its three engines discharging air with a velocity of 800 m/s relative to the plane
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