Ch. 4, 5, and 6 Energy, Work, and Power Review

Define Potential Energy.

• Energy of motion
• Energy based on height
• Energy of food
• Energy of heat

Define kinetic energy.

• Energy of motion
• Energy based on position
• Energy of food
• Energy of heat

Define chemical energy.

• Energy of motion
• Energy based on position
• Energy of foods and fuels
• Energy of heat

What two variables are used to calculate kinetic energy?

• mass and weight
• mass and velocity
• velocity and height
• weight and height

Besides gravity, what two variables are used to calculate gravitational potential energy?

• mass and velocity
• velocity and height
• weight and height
• mass and height

Define mechanical energy.

• All the energy in the universe
• The total potential and kinetic energy
• The energy of heat
• The energy of objects in motion

What causes kinetic energy to change into thermal energy?

• heat
• friction
• going too fast

• gravity

What happens to the mechanical energy of a falling object?

• Increases
• Decreases
• Stays the same
• Not enough information

Define the law of conservation of energy.

• Energy can be destroyed
• Energy can be created
• Energy can be created and destroyed
• Energy cannot be created or destroyed

Define power.

• Rate at which work is done
• The efficiency of a machine
• Amount of force applied across a distance