A 63.8 N crate is pulled up a 5.22 m inclined plane by a worker at constant velocity. If the plane is inclined at an angle of 59 degree to the horizontal and there exists a constant frictional force of 32.6 N between the crate and the surface, what is the force applied by the worker?

Answer 1

F= F(fr) + mgsinα=
=32.6 +63.8sin59=87.3 N