Energy Review

What are the different forms of energy?

• potential energy, kinetic energy, solar energy, wind energy

• thermal energy, electrical energy, nuclear energy, magnetic energy

• kinetic energy, potential energy, thermal energy, chemical energy, electrical energy, electromagnetic energy, and nuclear energy

• mechanical energy, sound energy, light energy, gravitational energy

Give an example of energy transformation.

• Wind turbine generating electricity

• Hydroelectric dam generating power

• Solar panel converting sunlight into electricity

• Car engine burning gasoline

Define potential energy.

• The energy possessed by an object due to its color.

• The energy possessed by an object due to its motion.

• The energy possessed by an object due to its temperature.

• The energy possessed by an object due to its position or condition.

What is kinetic energy?

• Energy possessed by an object due to its position

• Energy possessed by an object at rest

• Energy possessed by an object due to its temperature

• Energy possessed by an object due to its motion

How does friction affect energy?

• Friction increases mechanical energy.

• Friction converts mechanical energy into heat energy.

• Friction converts heat energy into mechanical energy.

• Friction has no effect on energy.

Name two forms of potential energy.

• Gravitational potential energy, Elastic potential energy

• Chemical potential energy

• Thermal potential energy

• Nuclear potential energy

What is the formula to calculate kinetic energy?

• KE = m * v

• KE = m * v^2

• KE = 1/2 * m * v^2

• KE = 1/2 * m * v

Explain the law of conservation of energy.

• Energy can only be transferred, not transformed.

• Energy can be created from nothing.

• Energy can be created and destroyed at will.

• Energy cannot be created or destroyed, only transferred or transformed.

What is the unit of energy?

• Watt

• Ampere

• Joule

• Volt

How does friction convert energy?

• By converting potential energy into kinetic energy.

• By converting thermal energy into kinetic energy.

• By transforming kinetic energy into thermal energy.

• By converting mechanical energy into electrical energy.