Question

Assume the 33 kN roller coaster starts from rest and is launched with electromagnetic motors along a horizontal section of track.
It takes 13 m to reach a speed of 27 m/s.

A. What force is applied to the roller coaster during the launch?(include units with answer)

B. A meter measures the energy input into the motors during the launch as 0.508 kW-hour. What is the efficiency of the motors? (%)

C. After the launch, the roller coaster goes straight up, shooting out of the mountain. A minimum speed of 7.9 m/s is required at the top. Assuming no losses, how high above the initial elevation can the coaster go?(include units with answer)

D. As the coaster comes down the hill to the same elevation at which it started, it loses 37800 J of energy. What is the speed at the bottom of the hill? (include units with answer)

E. After the run, the roller coaster comes into the station with a speed of 0.59 times the speed at the end of the launch. What percent of energy was lost during the run?

Answer 1