As a roller coaster goes downhill A) kinetic energy is converted into potential energy. B) potential energy is converted into kinetic energy. Eliminate C) electrical energy is converted into potential energy. D) potential energy is converted into electrical energy.

B potential energy is turned into kinetic energy

Potential energy is converted to kinetic energy. Firstly, the question says nothing about the use of electricity, an electric current, or any sort of voltage, so any answer about electrical energy is irrelevant. Secondly, the key is to understand what potential and kinetic energy mean. Potential energy is the energy that an object has when it is at rest. Kinetic energy is the energy of motion; it is potential energy that has been converted to energy used to do movements, so when a roller coaster falls, its potential energy at the top is converted to kinetic energy as it rolls down.