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
The car has a mass of 2000kg. Determine the shortest time it takes for it to reach a speed of 90 km/hr, starting from rest, if the engine drives the front wheels, whereas the rear wheels are free rolling. The coefficient of friction between the wheels and road is s=0.4, k=0.3. Neglect the mass of the wheels. What are the reactions at the front and rear wheels while the car is accelerating
4. The pipe has a mass of 600 kg and is being towed behind a truck. If the angle 0 = 30°,
determine the acceleration of the truck and the tension in the cable. The coefficient of kinetic
friction between the pipe and the ground is Hk = 0.1.
B
45°
Ge
0.4 m
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- 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_forward2. 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°arrow_forwardIf blocks A and B of mass 10 kg and 6 kg respectively, are placed on the inclined plane and released, determine the force developed in the link. The coefficients of kinetic friction between the blocks and the inclined plane are mA = 0.1 and mB = 0.3. Neglect the mass of the link.arrow_forward
- If the 200 kg crate starts from rest and travels a distance of 10 m up the plane in 6s, determine the magnitude of force acting on the crate. The coefficient of kinetic friction between the crate and the ground is μ=0.4. 30° P 30°arrow_forwardThe 35-kg crate is subjected to a force inclined to 70° respect to vertical plane having a constant direction and a magnitude F = 150 N. When s = 20 m, the crate is moving to the right with a speed of 10 m/s. Calculate for normal reaction and its speed when s = 30 m. The coefficient of kinetic friction between the crate and the ground is mk = 0.35.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_forward
- 1. The coefficient of kinetic friction between the 40-kg crate and the slanting floor is μ = 0.3. if the angle a = 20°, what tension must the person exert on the rope to move the crate at constant speed? 10° Tarrow_forwardIf the 50-kg wooden box was pulled from rest to a distance of 6 m up an inclined plane, determine the magnitude of the force P acting on the crate. The coefficient of kinetic friction between crate and ground is µ, = 0.25. Time the motion is 4 s. %3D 30° 30°arrow_forwardIf the 50 kg crate starts from rest and covers a distance of 7.8 meters upward in 4 seconds on a plane, then find the magnitude of the force P acting on the chest. The coefficient of kinetic friction between the crate and the floor is uk = 0.25. 30° 30arrow_forward
- The slotted arm OA rotates about a fixed axis through O. At the instant under consideration, 0 = 37,0 = 44 deg/s, and 0 = 23 deg/s². Determine the magnited of the force F applied by arm OA and the magnitude of the force N applied by the sides of the slot to the 0.5-kg slider B. Neglect all friction, and let L = 0.84 m. The motion occurs in a vertical plane. Answers: F= N= i i -L m N B N 79⁰arrow_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_forwardDetermine the steady-state angle a if the constant force P = 195 N is applied to the cart of mass M = 16 kg. The cart travels on the slope of angle 0 = 25° The pendulum bob has mass m = 4 kg and the rigid bar of length L = 1.1 m has negligible mass. Ignore all friction. P M L marrow_forward
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