A horizontal force of 150 N is used to push a 40.0-kg packing crate a distance of 6.00 m on a rough horizontal surface.

A horizontal force of 150 N is used to push a 40.0-kg packingcrate a distance of 6.00 m on a rough horizontal surface.If the crate moves at constant speed, find (a) thework done by the 150-N force and (b) the coefficient ofkinetic friction between the crate and surface.