A motorized crate of mass \(M\) is moved up a loading ramp at a constant speed \(v\). The ramp is inclined at an angle \(\theta\) above the horizontal, and friction between the crate and the ramp is negligible. In a second trial, the same crate is moved up the same ramp at a constant speed \(2v\). What is the ratio \(\dfrac{P_2}{P_1}\) of the average power delivered by the motor in the second trial to the average power delivered in the first trial?