Chapter 14, Problem 11P

The 4800-lb automobile shown in Fig. 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 uk = 0.8. 20 ft/s 10°

Determine the velocity of the 68.3-lb block A if both blocks are released from rest and the 26.2-lb block B moves 3.9 ft up the incline. The coefficient of friction between the plane and the blocks is us = 0.1.

A system of 8-kg block A and 42-kg plate B is released from rest in the position shown. The motor draws in the cable with a force FM = (150t) N, where is in seconds. Assume that the coefficients of kinetic and static friction are the same and given below. Determine the distance s that the plate B makes on the sloped ground when t-5 s. Neglect the mass of the rope and pulley. Assume that plate B is long enough to keep block A on it during all time. FM AB=0.2 A B 30° MBC = 0.1

If the coefficient of kinetic friction between the150-lb crate and the ground is uk = 0.2, %3D determine the speed of the crate when t = 4 s. The crate starts from rest and is towed by %3D the 100-lb force. 100 lb 30°

The 97-N block B has a speed of v 24 m/s when it is at the location shown It slides on the incline plane. After striking spring A, it comes to a rest before it rebounds and slides back on the plane. If the coefficient of kinetic friction between the plane and the block is u 0.23, for d= 1.9 m, 0 = 17, determine the coefficient cz in the expression C+ cod- for the work done of the spring during the time interval when the block is at the initial location to where it is at rest at the lowest location, where d is the largest compressed length of the spring. (Nm](sign sensitive) V. k-2 kN/m Type your answer.

The 250-lb concrete block A is released from rest in the position shown and pulls the 400-lb log up the 30° ramp. If the coefficient of kinetic friction between the log and the ramp is 0.5, determine the velocity of the block as it hits the ground at B. 400 lb A T 250 lb 20' B 30° H₂ = 0.5

Determine the velocity of the 60-lb block A if the two blocks are released from rest and the 40-lb block B moves 2 ft up the incline. The coefficient of kinetic friction between both blocks and the inclined planes is µk = 0.10. 60 30

a 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.

If 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° 30