Adisa Pulls a 35

Multiple Choice

Adisa pulls a 35.0-N crate up a 4.00-m-long inclined plane at a constant velocity.If the plane is inclined at an angle of 39.0° to the horizontal and there is a constant force of friction of 13.0 N between the crate and the surface,what is the net change in potential energy of the crate?

A) 88 J
B) −88 J
C) 109 J
D) −109 J
E) None of these