A 8.25-kg solar PV panel breaks loose from rest at point A, slides along the length L of the roof, falls off and hits the ground. The angle of the roof is 45.0. The kinetic energy of the PV panel is 175 J at the edge if the roof (point B), and the kinetic energy is 255 J as it hits the ground (point C). The panel loses 55.0 J to work by friction as it slides from A to B.

a. Solve for the length L.

b. Solve for the vertical height h, from the ground to the edge of the roof.

c. Solve for the time it takes the panel to fall from the edge of the roof to the ground (from B to C).

(This is all info I have. I do not have any info on the coefficient of friction)

round "C