Question

The path of motion of a roller - coaster is shown in the figure. At the start of the roller - coaster ride, a motor pulls it from point W to X. Although there is no motor to pull it up from point Y to Z, it still moves through the loop by itself.

Identify the energy conversions from Y to Z.

• A. Electrical energy $\to$ Potential energy
• B. Kinetic energy $\to$ Potential energy
• C. Kinetic energy $\to$ Electrical energy
• D. Potential energy $\to$ Kinetic energy

Answer 1

The correct option is B

Kinetic energy $\to$ Potential energy

At point Y, the roller coaster has maximum velocity, but the altitude is at its minimum. While going from point Y to point Z, the roller coaster gains altitude and in the process loses some of its velocity. Thus, Kinetic Energy is converted to Potential Energy.