Work: in the Figure, a 700-Kg Crate Is on a Rough

Work: In the figure, a 700-kg crate is on a rough surface inclined at 30°. A constant external force P = 5600 N is applied horizontally to the crate. As the force pushes the crate a distance of 3.00 m up the incline, the speed changes from 1.40 m/s to 2.50 m/s. How much work does gravity do on the crate during this process?

A) -10,300 J
B) -3400 J
C) +10,300 J
D) +3400 J
E) zero