(a) 150 * 5.5 Joules
(b) no acceleration so work done by friction = 150 * 5.5
mu m g *5.5 = 150 * 5.5
mu = 150/(45*9.81)
A horizontal force of 150 N is used to push a 45.0-kg packing crate a distance of 5.75 m on a rough horizontal surface. If the crate moves at constant speed, find each of the following.
(a) the work done by the 150-N force
(b) the coefficient of kinetic friction between the crate and the surface
1 answer
1 answer