Energy Transformations Answers

Which statements best describe the law of conservation of energy? Check all that apply.The total amount of energy in the universe remains constant.Energy can be created or destroyed.Energy cannot be created or destroyed.Energy can change from one type to another. In a closed, isolated system, energy is conserved.

A 100 kg roller coaster car is located at the top of a hill where the height is 20 m. What is the velocity when it reaches the bottom of the hill?