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Engineering Mechanics: Statics
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- The 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_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 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
- Find 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 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 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
- The 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 blocks in the diagram are in static equilibrium. a) draw a force diagram and for each block and set up forces balances on each block. b) determine the tension in the rope and the mass of block 1 (M1) c) if both blocks have the same mass of 90 kg, what would the magnitude and direction of the acceleration of each block be?arrow_forwardThe coefficient of static and kinetic friction between the 100-kg block and the inclined plane are 0.30 and 0.20 respectively. Determine (a) the friction forced F acting on the block when P is applied with a magnitude of 200 N to the block at rest (b) the force P required to impend motion up the incline.arrow_forward
- The 200-lb man walks up the inclined plank of negligible weight. The coefficients of static friction at A and B are 0.3 and 0.2, respectively. Determine the distance x at which the plank would begin to slide.arrow_forwardThe arms of a Porter governor are 300 mm long. The upper arms are pivoted on the axis of rotationand the lower arms are attached to the sleeve at a distance of 35 mm from the axis of rotation. The loadon the sleeve is 54 kg and the mass of each ball is 7 kg. Determine the equilibrium speed when the radius of the balls is 225 mm. What will be the range of speed for this position, if the frictional resistances to the motion of the sleeve are equivalent to a force of 30 N?[Ans. 174.3 r.p.m. ; 8.5 r.p.m.]arrow_forwardDetermine the force P needed to cause the impending motion of the blockarrow_forward
- International Edition---engineering Mechanics: St...Mechanical EngineeringISBN:9781305501607Author:Andrew Pytel And Jaan KiusalaasPublisher:CENGAGE L