A professor has to haul a cart down a ramp. the ramp has an angle of about 10 degrees and is about 5 meters long. his initial speed at the top of the ramp is 5.3 m/s, and the cart has a mass of about 85 kg. how hard does he have to pull on the cart so that at the bottom of the ramp, its speed does not exceed 6.1 m/s? neglecting friction, what is the magnitude of the minimum force he has to exert on the cart?
