A physics professor is pushed up a ramp inclined upward at an angle 35.0 ∘ above the horizontal as he sits in his desk chair that slides on frictionless rollers. The combined mass of the professor and chair is 90.0 kg . He is pushed a distance 3.00 m along the incline by a group of students who together exert a constant horizontal force of 600 N . The professor's speed at the bottom of the ramp is 2.15 m/s .
Use the work - energy theorem to find his speed at the top of the ramp.