A crate with a mass of 68.0 kg is pulled up an inclined surface by an attached chain, which is driven by a motor. The crate moves a distance of 65.0 m along the surface at a constant speed of 2.3 my's The surface is inclined at an angle of 30.0" with the horizontal. Assume friction is negligible. (a) How much work (in kJ) is required to pull the crate up the incline? (No Response) (b) What power (expressed in hp) must a motor have to perform this task? (No Response) hpA store uses an elevator to move items from one level to another. The elevator has a mass of 650 kg and moves upward with constant acceleration for 3.00 s until it reaches its cruising speed of 1.75 m/s. (Note: 1 hp = 746 W.) (a) What is the average power (in hp) of the elevator motor during this time interval? Pave " (No Response) hp (b) What is the motor power (in hp) when the elevator moves at its cruising speed? Peruising = (No Response) hp