Chapter 13, Problem 2P

The 50-kg crate is pulled by the constant force P. If the crate P starts from rest and achieves a speed of 10 m/s in 5 s, determine the magnitude of P. The coefficient of kinetic friction between the crate and the ground is µk = 0.2.

If the coefficient of kinetic friction between the 37-kg crate and the ground is μk = 0.31, determine the distance the crate travels in meters when t = 3.1 s. The crate starts from rest, and P = 254 N. Take θ = 33 o

The 65-kg crate rests on a horizontal platform for which the coefficient of kinetic friction is µk = 0.28. the crate is subjected to a 500-N towing force.Determine the velocity of the crate in 3s starting from rest and the weight of the crate?

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

The 18-kg block A slides on the surface for which μk = 0.3. The block has a velocity v = 10 m/s when it is s = 4 m from the 11-kg block B. The unstretched spring has a stiffness k = 1200 N/m . Take e = 0.6. The coefficient of friction is the same for both blocks.

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°

The log has a mass of 500 kg and rests on the ground for which the coefficients of static and kinetic friction are Hs = 0.5 and Mk = 0.4, respectively. The winch delivers a horizontal towing force T to its cable at A which varies as shown in the graph. Determine the speed of the log when t = 5 s. Originally the tension in the cable is zero. Hint: First determine the force needed to begin moving the log. T (N) 1800 T = 200 ? t (s) 3 АТ Note: Solve using Principle of Impulse and momentum

6. The 100 kg crate is subjected to forces F= 800 N and F2= 1.5 kN. as shown. If it is originally at rest, determine the distance it slides in order to attain a speed of v= 6 m/s. The coefficient of kinetic friction between the crate and the surface is u=0.2 800 N 1500 N 30 ,20

The 8-kg block is moving with an initial speed of 5 m/s. If the coefficient of kinetic friction between the block and plane is μk​=0.25, determine the compression in the spring when the block momentarily stops.