International Edition---engineering Mechanics: Statics, 4th Edition
4th Edition
ISBN: 9781305501607
Author: Andrew Pytel And Jaan Kiusalaas
Publisher: CENGAGE L
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Textbook Question
Chapter 7, Problem 7.55P
A wedge is used to prop up the 6000-lb block of marble. The wedge angle is
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The coefficient of static friction between the 50-kg crate and the ramp is μs = 0.35. The unstretched length of the spring is 800 mm, and the spring constant is k = 660 N/m. Determine the following:
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2 The friction force acting on the crate is Blank 2 N.
3 The minimum value of x at which the crate can remain stationary on the ramp is Blank 3 mm.
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Chapter 7 Solutions
International Edition---engineering Mechanics: Statics, 4th Edition
Ch. 7 - Can the two blocks be in equilibrium in the...Ch. 7 - Determine the range of P for which the system of...Ch. 7 - Two identical chairs, each weighing 14 lb, are...Ch. 7 - The two homogeneous bars AB and BC are connected...Ch. 7 - The contact surface between the 36-lb block and...Ch. 7 - The uniform bar AB of weight W is leaning against...Ch. 7 - The center of gravity of the 50-kg spool is at G....Ch. 7 - The brake pads at C and D are pressed against the...Ch. 7 - The 200-lb homogenous cylinder of radius R is...Ch. 7 - The rear-wheel-drive pickup truck, with its center...
Ch. 7 - Solve Prob. 7.10 assuming that the pick-up truck...Ch. 7 - The 2-lb bar is pinned at A and rests on the 4-lb...Ch. 7 - The horizontal force P acts on the rim of the...Ch. 7 - The uniform bar and the homogeneous cylinder each...Ch. 7 - A stepladder consisting of two legs pinned...Ch. 7 - The mass of the unbalanced disk is m, and its...Ch. 7 - The two uniform sheets of plywood, each of length...Ch. 7 - Find the largest value of b/h at which the folding...Ch. 7 - The 3600-lb car with rear Wheel drive is...Ch. 7 - The 3600-lb car with rear wheel drive is...Ch. 7 - The man is trying to push the homogeneous 20-kg...Ch. 7 - A 1.1-kg disk A is placed on the inclined surface....Ch. 7 - The 40-lb spool is suspended from the hanger GA...Ch. 7 - A uniform plank is supported by a fixed support at...Ch. 7 - The uniform bar of weight W is supported by a...Ch. 7 - The uniform plank is initially at rest on the...Ch. 7 - The two homogeneous bars with the weights shown...Ch. 7 - The man pushes the 120-lb homogeneous crate with...Ch. 7 - The 80-kg crate has its center of gravity at G....Ch. 7 - Solve Prob. 7.29 if =0.Ch. 7 - The 120-lb door with its center of gravity at G is...Ch. 7 - Determine the largest force P for which the 16-kg...Ch. 7 - Determine the largest angle for which the...Ch. 7 - The cylinder and the block are connected by a...Ch. 7 - The weight of the cylindrical tank is negligible...Ch. 7 - The coeffient of static friction between the...Ch. 7 - The two homogenous boxes are stacked vertically....Ch. 7 - Two concrete blocks weighing 320 lb each form part...Ch. 7 - Derive the expression for the largest angle ? for...Ch. 7 - The 60-lb plank rests on a frictionless roller at...Ch. 7 - The 2000-lb weight of the trailer is distributed...Ch. 7 - Determine the smallest force P, applied to the...Ch. 7 - The homogenous cylinder of weight W is at rest...Ch. 7 - The uniform bar of length L and weight W is kept...Ch. 7 - The movable bracket of negligible weight is...Ch. 7 - The 200-lb man walks up the inclined plank of...Ch. 7 - Determine the smallest coefficient of static...Ch. 7 - Find the smallest distance d for which the hook...Ch. 7 - Prob. 7.49PCh. 7 - The block of weight W is pulled by the force P...Ch. 7 - The two 200-lb blocks are pushed apart by the 15...Ch. 7 - Determine the smallest horizontal force P that...Ch. 7 - The device shown is used to measure the kinetic...Ch. 7 - The single-threaded screw of the floor jack has a...Ch. 7 - A wedge is used to prop up the 6000-lb block of...Ch. 7 - The square-threaded screw 0f the C-clamp has a...Ch. 7 - The square-threaded screw with a pitch of 10 mm...Ch. 7 - The screw of the carjack has a pitch of 0.1 in....Ch. 7 - How many turns of rope around the capstan are...Ch. 7 - The force P applied to the brake handle enables...Ch. 7 - Prob. 7.61PCh. 7 - The 120-kg block A is suspended from a rope that...Ch. 7 - The leather rein used to fasten the horse to the...Ch. 7 - The 30-lb weight is attached to a rope that runs...Ch. 7 - The rail AB of negligible weight is suspended from...Ch. 7 - The blocks A and B of weights WA and WB are joined...Ch. 7 - The 150-lb weight is attached to a rope that...Ch. 7 - The 50-lb homogeneous bar AB is suspended from a...Ch. 7 - The collar bearing carries the axial load P = 400...Ch. 7 - Solve Sample Problem 7.16 if the contact pressure...Ch. 7 - The 600-lb cable spool is placed on a frictionless...Ch. 7 - Prob. 7.72PCh. 7 - The normal pressure acting on the disk of the...Ch. 7 - Prob. 7.74PCh. 7 - The single-plate clutch transmits the torque C...Ch. 7 - The clutch described in Prob. 7.75 is to transmit...Ch. 7 - The cone clutch transmits the torque C through a...Ch. 7 - The figure shows a steel bar being processed by a...Ch. 7 - The coefficient of rolling resistance between the...Ch. 7 - Prob. 7.80PCh. 7 - Calculate the horizontal force P required to push...Ch. 7 - The uniform pole BC of length L and weight W is...Ch. 7 - The homogeneous bar AB of weight W and length L is...Ch. 7 - Find the smallest angle for which the uniform...Ch. 7 - Prob. 7.85RPCh. 7 - Determine the largest angle for which the uniform...Ch. 7 - Can the uniform bar of weight W remain at rest in...Ch. 7 - The panel of weight W with its center of gravity...Ch. 7 - The woman is trying to move the crate of weight W...Ch. 7 - The screw of the clamp has a square thread of...Ch. 7 - Find the largest clockwise couple C that can be...Ch. 7 - The test specimen AB is placed in the grip of a...Ch. 7 - The coefficient of static friction between the...Ch. 7 - The uniform bars AB and BC are connected with a...
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- The 600-lb cable spool is placed on a frictionless spindle that has been driven into the ground. If the force required to start the spool rotating is F = 160 lb, determine the coefficient of friction between the ground and the spool. Neglect the diameter of the spindle compared to the diameter of the spool.arrow_forwardThe leather rein used to fasten the horse to the hitching rail weighs 3.5 oz per foot. The coefficient of static friction between the rail and the rein is 0.6. If a 34-lb force acting on the bridle is sufficient to restrain the horse, determine the smallest safe length L for the free end of the rein.arrow_forwardThe 60-lb plank rests on a frictionless roller at A, and the 20-lb triangular support BD. Both bodies are homogenous. The coefficients of static friction are 0.4 at B and 0.3 at D. Determine the largest force P that can be applied to the plank without initiating motion.arrow_forward
- Two identical chairs, each weighing 14 lb, are stacked as shown. The center of gravity of each chair is denoted by G. The coefficient of static friction is 0.2 at B (the contact point between the chairs) and 0.35 at A, C, and D. Determine the smallest force P that would cause sliding.arrow_forwardThe 3600-lb car with rear Wheel drive is attempting to tow the 4500-lb crate. The center of gravity of the car is at G, and the coefficients of static friction are 0.6 at B and 0.2 at C. Determine if the crate will slide.arrow_forwardThe two uniform sheets of plywood, each of length L and weight W, are propped as shown. If the coefficient of static friction is 0.5 at all three contact surfaces, determine whether the sheets will remain at rest.arrow_forward
- The 40-lb spool is suspended from the hanger GA and rests against a vertical wall. The center of gravity of the spool is at G and the weight of the hanger is negligible. The wire wound around the hub of the spool is extracted by pulling its end with the force P. If the coefficient of static friction between the spool and the wall is 0.25, determine the smallest P that will extract the wire.arrow_forwardFind the largest value of b/h at which the folding table is in equilibrium. The coefficients of static friction are 0.5 at A and 0.3 at C. Neglect the weight of the table.arrow_forwardThe coefficient of rolling resistance between the 30-kg lawn roller and the ground is r=0.1. (a) Determine the force P required to pull the roller at a constant speed. (b) What force P would be needed to push the roller at a constant speed?arrow_forward
- The single-threaded screw of the floor jack has a pitch of 0.5 in. and a mean radius of 1.75 in. The angle of static friction is 8.5. (a) Determine the couple C that must be applied to the screw to start lifting a weight of 4000 lb. (b) What is the couple required to start lowering the weight?arrow_forwardThe man pushes the 120-lb homogeneous crate with the horizontal force P. Determine the largest distance h for which the crate will slide without tipping.arrow_forwardThe mass of the unbalanced disk is m, and its center of gravity is located at G. If the coefficient of static friction is 0.2 between the cylinder and the inclined surface, determine whether the cylinder can be at rest in the position shown. Note that the string AB is parallel to the incline.arrow_forward
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