PS.5a Review: KE and PE

Front

What is Kinetic Energy (KE)?

Back

Kinetic Energy is the energy an object possesses due to its motion. It depends on the mass and velocity of the object, calculated using the formula KE = 1/2 mv².

Front

What is Potential Energy (PE)?

Back

Potential Energy is the stored energy in an object due to its position or state. It is often associated with gravitational energy, calculated using the formula PE = mgh, where m is mass, g is acceleration due to gravity, and h is height.

Front

What is the Law of Conservation of Energy?

Back

The Law of Conservation of Energy states that energy cannot be created or destroyed, only transformed from one form to another. The total energy in a closed system remains constant.

Front

Give an example of energy transformation from mechanical to thermal energy.

Back

An example is hands rubbing together, where mechanical energy from the motion transforms into thermal energy due to friction.

Front

What type of energy does a blender use to operate?

Back

A blender uses electrical energy to function.

Front

What type of energy does a blender release while functioning?

Back

A blender releases mechanical energy as it blends food.

Front

How does a roller coaster demonstrate the transformation between kinetic and potential energy?

Back

As a roller coaster climbs, it gains potential energy. As it descends, that potential energy is converted into kinetic energy, demonstrating energy transformation.

Front

Which scenario does NOT involve energy transfer?

Back

A book sitting on a shelf does NOT involve energy transfer, as it is at rest and not interacting with energy.

Front

What is an example of energy transfer in a battery-powered device?

Back

A battery powering a remote control is an example of energy transfer, where chemical energy in the battery is converted to electrical energy.

Front

What is thermal energy?

Back

Thermal energy is the energy that comes from the temperature of matter. It is the total kinetic energy of particles in an object.