1. A boy in a pedal car is moving at a speed of 1.40 m/s at the
start of a 2.10 m high and 12.4 m long incline. The total mass is
54.5 kg, air resistance and rolling resistance can be modeled as a
constant friction force of 41.0 N, and the speed at the lower end
of the incline is 6.80 m/s. Determine the work done (in J) by the
boy as the car travels down the incline.
2....