
My Notc A tenion force of 145 N indined at 25.o above the horrontal is used...
A tension force of 145 N inclined at 25.0° above the horizontal is used to pull a 39.0 kg shipping crate a distance of 3.60 m on a rough surface. If the crate moves at a constant speed, find (a) the work done by the tension force and (b) the coefficient of kinetic friction between the crate and surface. i know that a is 473.09 but i cant figure out part b.