Types of Energy & Thermal Energy Review

Which simple machine is a variation of an inclined plane?

• lever

• wedge

• wheel and axel

• pulley

What factor can decrease the efficiency of a machine?

• output

• input

• input force

• friction

Which one describes the energy conversion occurring in a running car engine?

• mechanical to chemical

• thermal to chemical

• chemical to mechanical

• kinetic to mechanical

What factor affects gravitational potential energy of the object in an object-Earth system

• mass of the object

• surface area of the object

• the speed of the object

• the radius of the Earth

Which statement is true about the kinetic energy of an apple falling from a tree?

• kinetic energy remains constant

• kinetic energy increases

• kinetic energy decreases

Which statement is true about the potential energy of an apple falling from a tree?

• potential energy remains constant

• potential energy increases

• potential energy decreases

At which point of the a roller coaster track, would the coaster have the greatest kinetic energy?

• At the bottom of the first hill

• At the top of the first hill

• At the top of the last hill

• At the bottom of the last hill

The Law of Conservation of Energy states that

• energy is not created or destroyed and its form is constant

• energy cannot be created or destroyed

• energy cannot be created and destroyed but cannot change form

• when energy is transformed, the total energy of a system is less than it was before the change

Energy is defined as the ability to cause change.

• True

• False

Which of the following are types of energy (Check all that apply)?

• gravitational potential energy

• potential energy

• kinetic energy

• mechanical energy

• elastic potential energy