PEARSON ETEXT ENGINEERING MECH & STATS
15th Edition
ISBN: 9780137514724
Author: HIBBELER
Publisher: PEARSON
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The system consists of the two smooth spheres, each
weighing 3 lb and connected by a light spring, and
the two bars of negligible weight hinged freely at
their ends and hanging in the vertical plane. The
spheres are confined to slide in the smooth horizontal
guide. If a horizontal force F = 10 lb is applied to the
one bar at the position shown, what is the accelera-
tion of the center C of the spring? Why does the re-
sult not depend on the dimension b?
The mechanism shows two identical 2-kg bars that are 0.15 m long each. They are hinged together at the lower ends and are supported at the upper ends by small rollers of negligible mass which roll on a horizontal rail. Determine the steady state angle assumed by the bars when they are accelerating under the action of a constant horizontal force FN. Also, find the forces on the rollers at A and B as well as the reactions at the hinge C. Take the value of the force F is equal to 123.45 Newtons.
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- in the pulley system and the diagram above, assume that the bearings at oh and C are properly aligned and smooth and that T2 =30 N all dimensions in millimeters and the belt tensions are all tangential to the pulleys a. If the shaft runs at a constant speed, determine the tension T1 b draw a free body diagram of the shaft and determine the reactions at bearing sea in terms of the components along the Y and Z axis. Assume neither bearing and oh or see produces an axial thrustarrow_forwardThe frame is made from uniform rod which has a mass p per unit length. A smooth recessed slot constrains the small rollers at A and B to travel horizontally. Force P is applied to the frame through a cable attached to an adjustable collar C. Determine the magnitudes and directions of the normal forces which act on the rollers if (a) h = 0.25L, (b) h = 0.50L, and (c) h = 0.81L. The forces will be positive if up, negative if down. Evaluate your results for p = 2.5 kg/m, L = 510 mm, and P = 43 N. What is the acceleration of the frame in each case? Answers: (a) (b) L (c) h= 0.25L: h = 0.50L: h = 0.81L: L A A A = B i i i h P N. N. N₁ B i i i N. N. N. i i i m/s m/s m/sarrow_forward3/4 The uniform beam has a mass of 50 kg per meter of length. Determine the reactions at the supports. -2.4 m 1.2 m 300 kg |B Problem 3/4arrow_forward
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