A dockworker loading crates on a ship finds that a 35-kg crate, initially at rest on a horizontal surface, requires a 71-N horizontal force to set it in motion. However, after the crate is in motion, a horizontal force of 52 N is required to keep it moving with constant speed. Find the coefficients of static and kinetic friction between crate and floor. static friction kinetic friction

Current Attempt in Progress A 18-kg sled is being pulled along the horizontal snow-covered ground by a horizontal force of 22 N. Starting from rest, the sled attains a speed of 2.5 m/s in 9.2 m. Find the coefficient of kinetic friction between the runners of the sled and the snow. Number i eTextbook and Media GO Tutorial Save for Later Units Attempts: 0 of 4 used Submit Answer

Challenge Problem : 2D Force application A 18kg crate is pushed across the floor, using a force that makes an angle of 21° with the horizontal. The coefficient of static friction between crate and floor is us = 0.45. The coefficient of kinetic friction between crate and floor is uk = 0.20. a) What magnitude of pushing force is required to just start the crate sliding? b) Once it has started sliding, if you continue to push the crate with the same amount of force found in "a", what will its acceleration be? Cla