PEARSON ETEXT ENGINEERING MECH & STATS
15th Edition
ISBN: 9780137514724
Author: HIBBELER
Publisher: PEARSON
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If blocks D and F weigh 5 lb each, determine the weight of block E if the sag s=3 ft. Neglect the
size of the pulleys.
4 ft
4 ft-
D.
Determine the total force the man must exert on bar AB using the first method.
Determine the normal reaction the man exerts on the platform at C using the first method.
Determine the total force the man must exert on bar AB using the second method.
Determine the normal reaction the man exerts on the platform at C using the second method.
The 80-N box is held in place onthe smooth inclined surface by the rope AB. Determinethe tension in the rope and the normal force exertedon the box by the inclined surface.
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- The 1200-lb homogeneous block is placed on rollers and pushed up the 10 incline at constant speed. Determine the force P and the roller reactions at A and B.arrow_forwardThe homogeneous bar AB weighs 25 lb. Determine the magnitudes of the forces acting on the bar at A and B. Neglect friction.arrow_forwardThe 40-kghomogeneous disk is placed on a frictionless inclined surface and held in equilibrium by the horizontal force P and a couple C (C is not shown on the figure). Find P and C.arrow_forward
- The uniform, 30-lb ladder is raised slowly by pulling on the rope attached at A. Determine the largest angle that the ladder can attain if the maximum allowable tension in rope BC is 120 lb.arrow_forwardThe cable is loaded by an 80-lb vertical force at C and a horizonal force P at B. Determine P.arrow_forwardThe woman is trying to move the crate of weight W by pulling on the rope at the angle to the horizontal. Find the smallest possible tension that would cause the crate to slide and the corresponding angle .arrow_forward
- The 80-kg crate has its center of gravity at G. Determine the smallest force P that will initiate motion if =35.arrow_forwardThe uniform, 20-kg bar is placed between two vertical surfaces. Assuming sufficient friction at A to support the bar, find the magnitudes of the reactions at A and B.arrow_forwardThe two uniform cylinders, each of weight W, are resting against inclined surfaces. Neglecting friction, draw the free-body diagrams for each cylinder and for the two cylinders together. Count the total number of unknowns and the total number of independent equilibrium equations.arrow_forward
- Calculate the force P that is required to hold the 120-lb roller at rest on the rough incline.arrow_forwardThe 60-lb homogeneous door is supported by hinges at A and B, with only the hinge at B being capable of providing axial thrust. The cable CD prevents the door from fully opening when it is pulled by the 40-lb force acting perpendicular to the door. Draw the FBD for the door, and count the unknowns.arrow_forwardThe cable of mass 1.8 kg/m is attached to a rigid support at A and passes over a smooth pulley at B. If the mass M = 40 kg is attached to the free end of the cable, find the two values of H for which the cable will be in equilibrium. (Note: The smaller value of H represents stable equilibrium.)arrow_forward
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