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
Question 2
A 35.0-N crate is pulled up a 4.0-m inclined plane by a worker at constant velocity. If the plane is inclined at an angle of 37 to the horizontal and there exists a constant frictional force of 25.0 N between the crate and the surface, what is the force applied by the worker?
a. zero
b. 3.95 N
c. 21.1 N
d. 46.1 N
e. 84.2 N
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