Engineering Mechanics: Statics Plus Masteringengineering With Pearson Etext -- Access Card Package (13th Edition)
13th Edition
ISBN: 9780133009545
Author: Russell C. Hibbeler
Publisher: Prentice Hall
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Question
Chapter 8.5, Problem 91P
To determine
The force exerted by a worker on the rope to lower the pipe at constant speed.
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The man having a weight of 90 kg pushes horizontally on the crate. İf the coefficient of static friction between the 225 kg crate and the floor is μs=0.3 and between his shoes and the floor is μs’=0.6. determine if he can move the crate.
If the 75-lb girl is at position d = 4 ft, determine the following. Neglect the weight of the plank.
A. The minimum coefficient of static friction μs at contact points A and B so that the plank does not slip is_________.
B. The normal force at A is _________ lb given the same condition at Question A
C. The normal force at B is ________ lb given the same condition at Question A
Determine the minimum force P to prevent the 30-kg rod AB from sliding. The contact surface at B is smooth, whereas the coefficient of static friction between the rod and the wall at A is = 0. - 4m -
Chapter 8 Solutions
Engineering Mechanics: Statics Plus Masteringengineering With Pearson Etext -- Access Card Package (13th Edition)
Ch. 8.2 - Determine the friction developed between the 50-kg...Ch. 8.2 - Determine the minimum force P to prevent the 30-kg...Ch. 8.2 - Determine the maximum force P that can be applied...Ch. 8.2 - If the coefficient of static friction at contact...Ch. 8.2 - Determine the maximum force P that can be applied...Ch. 8.2 - Prob. 6FPCh. 8.2 - Blocks A, B, and C have weights of 50 N, 25 N, and...Ch. 8.2 - If the coefficient of static friction at all...Ch. 8.2 - Using the coefficients of static friction...Ch. 8.2 - Prob. 1P
Ch. 8.2 - The tractor exerts a towing force T=400 lb....Ch. 8.2 - The winch on the truck is used to hoist the...Ch. 8.2 - Prob. 4PCh. 8.2 - Prob. 5PCh. 8.2 - Prob. 6PCh. 8.2 - The block brake consists of a pin-connected lever...Ch. 8.2 - The block brake consists of a pin-connected lever...Ch. 8.2 - Prob. 9PCh. 8.2 - Prob. 10PCh. 8.2 - The block brake is used to stop the wheel from...Ch. 8.2 - If a torque of M=300 Nm is applied to the...Ch. 8.2 - The cam is subjected to a couple moment of 5N m....Ch. 8.2 - Determine the maximum weight W the man can lift...Ch. 8.2 - The car has a mass of 1.6 Mg and center of mass at...Ch. 8.2 - Prob. 16PCh. 8.2 - Prob. 17PCh. 8.2 - Prob. 18PCh. 8.2 - Prob. 19PCh. 8.2 - Prob. 20PCh. 8.2 - Prob. 21PCh. 8.2 - Prob. 22PCh. 8.2 - A 35-kg disk rests on an inclined surface for...Ch. 8.2 - The man has a weight of 200 lb, and the...Ch. 8.2 - Prob. 25PCh. 8.2 - Prob. 26PCh. 8.2 - Prob. 27PCh. 8.2 - Prob. 28PCh. 8.2 - Prob. 29PCh. 8.2 - Prob. 30PCh. 8.2 - If the coefficient of static friction at A and B...Ch. 8.2 - Prob. 32PCh. 8.2 - Prob. 33PCh. 8.2 - Prob. 34PCh. 8.2 - Prob. 35PCh. 8.2 - Prob. 36PCh. 8.2 - Prob. 37PCh. 8.2 - Prob. 38PCh. 8.2 - Prob. 39PCh. 8.2 - Two blocks A and B have a weight of 10 Ib and 6...Ch. 8.2 - Two blocks A and B have a weight of 10 Ib and 6...Ch. 8.2 - Prob. 42PCh. 8.2 - Prob. 43PCh. 8.2 - Prob. 44PCh. 8.2 - Prob. 45PCh. 8.2 - The beam AB has a negligible mass and thickness...Ch. 8.2 - It is supported at one end by a pin and at the...Ch. 8.2 - Prob. 48PCh. 8.2 - Prob. 49PCh. 8.2 - Prob. 50PCh. 8.2 - Prob. 51PCh. 8.2 - Prob. 52PCh. 8.2 - The wheel weights 20 lb and rests on a surface for...Ch. 8.2 - Prob. 54PCh. 8.2 - Determine the greatest angle so that the ladder...Ch. 8.2 - Prob. 56PCh. 8.2 - Prob. 57PCh. 8.2 - Prob. 4CPCh. 8.4 - Determine the largest angle that will cause the...Ch. 8.4 - If the beam AD is loaded as shown, determine the...Ch. 8.4 - Prob. 60PCh. 8.4 - Prob. 61PCh. 8.4 - If P=250 N, determine the required minimum...Ch. 8.4 - Determine the minimum applied force P required to...Ch. 8.4 - Prob. 64PCh. 8.4 - Prob. 65PCh. 8.4 - Prob. 66PCh. 8.4 - Prob. 67PCh. 8.4 - If the clamping force on the boards is 600 lb,...Ch. 8.4 - Prob. 69PCh. 8.4 - If the force F is removed from the handle of the...Ch. 8.4 - If the clamping force at G is 900 N, determine the...Ch. 8.4 - If a horizontal force of F = 50 N is applied...Ch. 8.4 - Prob. 73PCh. 8.4 - Prob. 74PCh. 8.4 - The shaft has a square-threaded screw with a lead...Ch. 8.4 - Prob. 76PCh. 8.4 - Prob. 77PCh. 8.4 - Prob. 78PCh. 8.4 - If a horizontal force of P = 100 N is applied...Ch. 8.4 - Determine the horizontal force P that must be...Ch. 8.4 - Prob. 81PCh. 8.4 - Prob. 82PCh. 8.5 - A cylinder having a mass of 250 kg is to be...Ch. 8.5 - A cylinder having a mass of 250 kg is to be...Ch. 8.5 - Prob. 85PCh. 8.5 - Prob. 86PCh. 8.5 - Prob. 87PCh. 8.5 - The coefficient of static friction between the...Ch. 8.5 - Prob. 89PCh. 8.5 - Prob. 90PCh. 8.5 - Prob. 91PCh. 8.5 - Prob. 92PCh. 8.5 - Prob. 93PCh. 8.5 - Determine the weight of the cylinder if the...Ch. 8.5 - If slipping does not occur at the wall, determine...Ch. 8.5 - Prob. 96PCh. 8.5 - Prob. 97PCh. 8.5 - Show that the frictional relationship between the...Ch. 8.5 - Prob. 99PCh. 8.5 - Determine the largest angles so that the cord...Ch. 8.5 - Prob. 101PCh. 8.5 - Determine the smallest counterclockwise twist or...Ch. 8.5 - Prob. 103PCh. 8.5 - Prob. 104PCh. 8.5 - Determine the smallest stretch of the spring...Ch. 8.5 - Idler pulley A, and motor pulley B. If the motor...Ch. 8.8 - Prob. 107PCh. 8.8 - Prob. 108PCh. 8.8 - Prob. 109PCh. 8.8 - Prob. 110PCh. 8.8 - Prob. 111PCh. 8.8 - Prob. 112PCh. 8.8 - Prob. 113PCh. 8.8 - Prob. 114PCh. 8.8 - Prob. 116PCh. 8.8 - Prob. 117PCh. 8.8 - Prob. 118PCh. 8.8 - Prob. 119PCh. 8.8 - Prob. 120PCh. 8.8 - Prob. 121PCh. 8.8 - Prob. 122PCh. 8.8 - Prob. 123PCh. 8.8 - Prob. 124PCh. 8.8 - Prob. 125PCh. 8.8 - Prob. 126PCh. 8.8 - Prob. 127PCh. 8.8 - The vehicle has a weight of 2600 lb and center of...Ch. 8.8 - The tractor has a weight of 16 000 lb and the...Ch. 8.8 - Prob. 130PCh. 8.8 - Prob. 131PCh. 8.8 - Prob. 132PCh. 8.8 - Prob. 133RPCh. 8.8 - Prob. 134RPCh. 8.8 - Prob. 135RPCh. 8.8 - Prob. 136RPCh. 8.8 - The three stone blocks have weights of, WA =...Ch. 8.8 - The uniform 60-kg crate C rests uniformly on a...Ch. 8.8 - Prob. 139RPCh. 8.8 - Prob. 140RPCh. 8.8 - Prob. 141RPCh. 8.8 - Prob. 142RPCh. 8.8 - Prob. 143RPCh. 8.8 - Prob. 144RP
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- The 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 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_forwardThe 120-kg block A is suspended from a rope that runs around the fixed pegs B and C. The coefficient of static friction between the pegs and the rope is 0.25. Determine the range of the force P for which the system is in equilibrium.arrow_forward
- The 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_forwardDetermine the required Weight of block A so that block B will impend upward, assuming that a -N the 740 -Newton force acts perpendicular to block A. The weight of the block B is 540 coefficient of friction between block A and the wall, as well as block B and the inclined floor is 0.4, with respect to the whereas 0.25 for the fixed drum and rope. The floor is inclined at horizontal plane. 30° 540 B. A 740 ( 30)°arrow_forwardThe man is trying to push the homogeneous 20-kg ladder AB up a wall by applying the horizontal force P. Determine the smallest value of P that would move the ladder. The coefficient of static friction between the ladder and both contact surfaces is 0.3.arrow_forward
- If the coefficient of static friction at the contact points A and B is μs = 0.4, determine the following. Neglect the weight of the plank. A. The minimum distance d where a 75-lb girl can stand on the plank without causing it to slip is ______ ft. B. The normal force at A is _________ lb given the same condition at Question A. C. The normal force at B is _________ lb given the same condition at Question A.arrow_forwardDetermine the Tension in the cable for the 250N block A not to slide down in the inclined plane. Given that the coefficient of static friction in the 45° inclined plane is 0.25 and in the 30° inclined plane is 0.3. (Assume frictionless pulley) Determine the tension on the cable for the 250N block A not to slide up in the inclined plane. Given that the coefficient of static friction in the 45° inclined plane is 0.25 and in the 30° inclined plane is 0.3. (Assume frictionless pulley)arrow_forwardIn the photo, the man has a mass of 60 kg and the crate has a mass of 100 kg. The coefficient of static friction between his shoes and the ground is μs = 0.4 and between the crate and the ground is μc = 0.3. a) Determine if the man is able to move the crate using the rope-and-pulley system shown. b) Prove your answer to part A by calculating the static frictional force F between the man's shoes and the ground required to move the crate and the maximum static frictional force Fmax which can be developed. Express your answers in newtons to three significant figures separated by a comma.arrow_forward
- block A and B block have a mass of 7 kg and 10 kg, respectively. Using the indicated static friction coefficients, determine the greatest vertical force P that can be applied to the wire without causing motion. Uniformsarrow_forwardThe 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: 1 The normal force acting on the crate is Blank 1 N. 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.arrow_forwardDetermine the smallest horizontal force P required to lift the 100-kg cylinder. The coefficient of static friction at the contact points A and B are 0.6 and 0.2, respectively. The coefficient of static friction between the wedge and the ground is 0.3.arrow_forward
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