A 20.0 kg box slides down a 12.0 m long incline at an angle of 30.0 degrees with the horizontal. A force of 50.0 N is applied to the box in the upward direction. The applied force F makes an angle of 0.00 to the incline. If the incline has a coefficient of kinetic friction of 0.000, then the increase in the kinetic energy of the box is

Select one:

a.
620 J.

b.
576 J.

c.
542 J.

d.
500 J.

e.
475 J.