PEARSON ETEXT ENGINEERING MECH & STATS
15th Edition
ISBN: 9780137514724
Author: HIBBELER
Publisher: PEARSON
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1. If the 50-kg crate starts from rest and achieves a velocity of v = 4 m/s when it travels a distance of 5 m to
the right, determine the magnitude of the force P acting on the crate. The coefficient of static friction
between the crate and the ground is u. = 0.3
30
2. The car, having a mass of 1000 kg, is traveling horizontally along a 20° banked track which is
circular and has a radius of curvature of p = 100 m. If the coefficient of static friction between
the tires and the road is us = 0.3, determine the minimum and maximum constant speed at
which the car can travel without sliding down and up the slope. Neglect the size of the car.
e= 20°
The crate has a mass of 80 kg and is being towed by
a chain which is always directed at 20° from the horizontal
as shown. If the magnitude of P is increased until the crate
begins to slide, determine the crate's initial acceleration if
the coefficient of static friction is = 0.5 and the
coefficient of kinetic friction is pk = 0.3.
13
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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 force F, acting in a constant direction on the 24-kg block, has a magnitude which varies with the position s of the block. When s = 0 the block is moving to the right at v = 6 m/s. The coefficient of kinetic friction between the block and surface is μk = 0.3. Determine how far the block must slide before its velocity becomes 15 m/s. No hand written solution and no imagearrow_forwardWhen s = 55 cm, the spring is unstretched and the 9-kg block has a speed of 6.19 m/s down the smooth plane. If the coefficient of kinetic friction between the surface and the block is 0.25, find the distance (mm) s at which the block stops. k = 208 N/m 6.19 m/s F = 118 N 30arrow_forward
- 1. The 40-kg crate is pulled by the constant force P. If the crate starts from rest and achieves a speed of 10 m/s in 9 s, determine the magnitude of P. The coefficient of kinetic friction between the crate and the ground is 0.15. 30°arrow_forwardThe coefficient of static friction between the 200-kg crate and the flat bed of the truck is 0.3. Determine the shortest time for the truck to reach a speed of 60 km/h, starting from rest with constant acceleration, so that the crate does not slip.arrow_forwardPls. specify the procedurearrow_forward
- The 20-kg crate is subjected to a force having a constant direction and a magnitude F = 100 N. When s the crate is moving to the right with a speed of 8 m/s. Determine its speed when s = 25 m. The coefficient of kinetic friction between the crate and the ground is 15 m, %3D µ= 0.25 30°arrow_forwardThe 3500-lb automobile shown in Fig. 14-10a travels down the 10 inclined road at a speed of 20 ft/s. If the driver jams on the brakes, causing his wheels to lock, determine how far s the tires skid on the road. The coefficient of kinetic friction between the wheels and the road is u 0.5. 20 ft/s (a)arrow_forwarda 7.4 lb block has a speed of v-2.4 ft/s to the left when the force of F=3.6t^3 lb is applied to the right. determine the velocity and position of the block when t= 0.2 seconds. the coefficient of friction at the surface is uk= 0.2. provide both a free body diagram and a kinetic diagram. the force is being applied in the opposite direction to the velocity of the block.arrow_forward
- F 15° 0.6 m 1 m The crate has a mass of 58 kg and rests on the inclined platform of the truck. Determine the minimum acceleration that will cause the crate to tip over or slide relative to the forklift. What is the magnitude of this acceleration? The coefficient of static friction between the packaging and the truck is µs= 0.7.arrow_forwardr The bottle shown rests at a distance of 3 feet from the centre of the horizontal platform. If the coefficient of static friction between the bottle and the platform is us speed the bottle can attain before it flies off. Assume the disc increases in speed gradually until the bottle starts to move relative to the disc. 0.2, determine the maximum tangential ft V = Sarrow_forwardThe truck carries the 1200-lb safe, which has a center of mass at G as shown in (Figure 1). Figure DU W 1.5 ft 1.5 ft H 1 of 1 3.5 ft 2.5 ft Part A Determine the largest acceleration of the truck so that the safe will not slip or tip on the truck bed. The coefficient of static friction between the safe and the truck is μ = 0.55. Express your answer in feet per squared second to three significant figures. amaz Submit VE ΑΣΦ | Η vec Provide Feedback Request Answer ? Next >arrow_forward
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