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A 320-lb load of lumber is lifted using a triple leg sling. Knowing that at the instant shown the lumber is at rest determine the tension in each leg
A 3000-lb automobile starts from rest and travels 1200 ft during a performance test. The motion of the automobile is defined by the relation a = 11e-0.0005x
A 4-lb collar can slide without friction along a horizontal rod and is released from rest at A.
A 4-kg uniform slender rod AB is held in position by two ropes and the link CA which has a negligible weight
A 4-kg slender rod is welded to the edge of a 3-kg uniform disk as shown. The assembly rotates about A in a vertical plane under the combined effect of gravity
A 2000-kg automobile starts from rest at point A on a 6o incline and coasts through a distance of 150 m to point B.
A 4-kg projectile is fired vertically with an initial velocity of 90 m/s, reaches a maximum height and falls to the ground
A 40-g bullet is fired with a horizontal velocity of 600 m/s into the lower end of a slender 7-kg bar of length L = 600 mm
A 4.08-kg block is supported as shown by three springs, each of which has a constant k. In the equilibrium position the tensions in springs A, B, and C are 12N
A 27-kg disk is attached with an eccentricity e = 150µm to the midpoint of a vertical shaft AB which revolves at a constant angular velocity ?f.
A 24-kg uniform cylindrical roller, initially at rest, is acted upon by a 100-N force as shown. Knowing that the body rolls without slipping, determine
A 24-ft-long pole AB is placed in a hole and is guyed by three cables. Knowing that the tensions in cables BD and BE are 221 lb and 161 lb, respectively
A 24-ft length of chain having a weight per unit length of 2.73 lb/ft is attached to a beam at A and passes over a small pulley at B as shown
A 2720-lb piece of machinery hangs from a cable which passes over a pulley at E and is attached to a support at D.
A 250-kg crate B is suspended from a cable attached to a 20-kg trolley A which rides on an inclined I-beam as shown
A 25-kg block is supported by the spring arrangement shown. If the block is moved vertically downward from its equilibrium position and released
A 3-kg model rocket is launched vertically and reaches an altitude of 60 m with a speed of 28 m/s at the end of powered flight, time t = 0.
A 3-kg collar C slides on a frictionless vertical rod. It is pushed up into the position shown, compressing the upper spring by 50 mm and released.
A 28-g steel-jacketed bullet is fired with a velocity of 650 m/s toward a steel plate and ricochets along path CD with a velocity 500 m/s.
A 28-g bullet is fired with a velocity of 550 m/s into a block A, which has a mass of 5 kg. The coefficient of kinetic friction between block A and the cart BC
A 3-kg uniform arm ABC is supported by a pin at B and is attached to identical springs at A and C. The system is in equilibrium in a vertical plane
A 3-kg slender rod rotates in a vertical plane about a pivot at B. A spring of constant k = 300 N/m and of un-stretched length 120 mm is attached to the rod
A 2.5-kg homogeneous disk of radius 100 mm rotates with an angular velocity ?1 with respect to arm ABC, which is welded to a shaft DCE rotating as shown
A 2.4-m-long boom is held by a ball-and-socket joint at C and by two cables AD and BE. Determine the tension in each cable and the reaction at C.