Energy & Energy Transformations

Front

What is total energy?

Back

The sum of the potential and kinetic energy, plus any dissipated energy.

Front

What is the acceleration of an object due to gravity on Earth?

Back

9.8 m/s².

Front

What happens to potential and kinetic energy when a bicycle rider reaches the top of a hill?

Back

When the rider is at the top of the hill, her potential energy is the greatest, and her kinetic energy is the least.

Front

How do you calculate gravitational potential energy?

Back

Gravitational potential energy (GPE) = mass (kg) × gravity (9.8 m/s²) × height (m).

Front

What is the weight of an object if its gravitational potential energy is 162 J and it is 3.8 m off the ground?

Back

43 N.

Front

What happens to total mechanical energy in a system without friction or external forces?

Back

The total mechanical energy of a system will remain constant.

Front

Define kinetic energy.

Back

Kinetic energy is the energy an object has due to its motion, calculated as KE = 1/2 mv².

Front

Define potential energy.

Back

Potential energy is the stored energy in an object due to its position or state, such as gravitational potential energy.

Front

What is the principle of conservation of energy?

Back

Energy cannot be created or destroyed, only transformed from one form to another.

Front

What is an example of energy transformation?

Back

When a light bulb converts electrical energy into light and heat energy.