Adisa Pulls a 40-N Crate Up a 6

Multiple Choice

Adisa pulls a 40-N crate up a 6.0-m long inclined plane at a constant velocity.If the plane is inclined at an angle of 38° 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) 148 J
B) −148 J
C) 189 J
D) −189 J
E) ​None of these