2. A rollercoaster car, 300 kg with passengers, accelerates
down a 65° hill. We will assume that friction is small enough
that it can be ignored.
A. Draw a force diagram for the system of car and riders.
B. What is the acceleration of the rollercoaster down the hill?
C. If they are traveling 4 m/s at the time shown in the picture, how fast will they be traveling at the
end of the straight stretch, 20 m later?