R13-2. The motor M pulls in its attached rope with an acceleration q = 6 m/s². Determine the towing force ар exerted by M on the rope in order to move the 50-kg crate up the inclined plane. The coefficient of kinetic friction between the crate and the plane is μ = 0.3. Neglect the mass of the pulleys and rope. k

The 40-kg disk is rotating at e = 100 rad/s. When the force Pis applied to the brake as indicated by the graph. If the cocfficient of kinetic friction at B is pe= 0.3, determine the time t needed to stay the disk from rotating. Neglect the thickness of the brake.

14-1. The 20-kg crate is subjected to a force having a constant direction and a magnitude F = 100 N. When s = 15 m, 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 µ, = 0.25. 30°

Assume that a driver (car modeled as a point mass) is negotiating a circular turn with a radius of 160 ft. The car and driver have a mass of 3800 lb and the coefficient of friction between the car and road is µ1 = 0.85. What is the maximum constant speed for which the car can travel at the given radius? r= 160 ft

The motor winds in the cable with a constant acceleration, such that the 20-kg crate moves a distance s = 6 m in 3 s, starting from rest. Determine acceleration. what is the normal force (N) at point A. Determine the tension developed in the cable. The coefficient of kinetic friction between the crate and the plane is u= 0.3.

The 925-kg motorized unit A is designed to raise and lower the 615-kg bucket B of concrete. Determine the average force R which supports unit A during the 5.9 seconds required to slow the descent of the bucket from 4.6 m/s to 0.9 m/s. Analyze the entire system as a unit without finding the tension in the cable. Answer: R = i kN

Determine the speed v which the 690-kg four-man bobsled must have in order to negotiate the turn without reliance on friction. Also find the net normal force N exerted on the bobsled by the track. 23° Answers: V= i N = i -p=58 m m/s kN

Pls. specify the procedure

*13–16. The 75-kg man pushes on the 150-kg crate with a horizontal force F. If the coefficients of static and kinetic friction between the crate and the surface are µ, = 0.3 and Hi = 0.2, and the coefficient of static friction between the man's shoes and the surface is µ, = 0.8, show that the man is able to move the crate. What is the greatest acceleration the man can give the crate?

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°