Question

7 which best describes the transformation of energy of a rollercoaster? the mechanical energy of the rollercoaster is converted into sound energy. the sound energy of the rollercoaster is converted into mechanical energy. the potential energy of the rollercoaster is converted into kinetic energy when it is moving. the chemical energy from the rollercoaster is converted into mechanical and heat.

Explanation:

A roller - coaster has potential energy at the top of a hill and kinetic energy as it moves. During its motion, the potential energy is converted into kinetic energy. Also, some mechanical energy is lost as heat due to friction and as sound energy. Chemical energy is not involved in the basic energy transformation of a roller - coaster. Mechanical energy is the sum of potential and kinetic energy, and it is not converted into mechanical energy from sound energy in the context of roller - coaster energy transformation.

Answer:

The potential energy of the rollercoaster is converted into kinetic energy when it is moving.