Adisa Pulls a 50-N Crate Up a 5

Multiple Choice

Adisa pulls a 50-N crate up a 5.0-m long inclined plane at a constant velocity.If the plane is inclined at an angle of 37° to the horizontal and there is a constant force of friction of 10 N between the crate and the surface,what is the net change in potential energy of the crate?

A) 120 J
B) −120 J
C) 250 J
D) 150 J