Energy conservation with friction on incline

Steps:

• Initial kinetic energy at P is 0; final kinetic energy at Q is 0.
• Change in potential energy from P to Q equals work done against resistive force.
• Without height at P or slope angle, vertical distance traveled cannot be determined from distance along slope (1.5 km) and resistive force (300 N).
• Point O at 90 m provides initial height, but P and Q positions relative to O are unspecified.

Not enough information.

Final answer: Not enough information.