Understanding Energy, Work, and Power

What is the primary source of energy for most life on Earth?

• The Moon

• The Sun

• The Ocean

• The Wind

How is energy commonly defined in physics?

• The ability to do work

• The ability to produce light

• The ability to generate heat

• The ability to create matter

Which law states that energy cannot be created or destroyed?

• Law of Motion

• Law of Conservation of Energy

• Law of Inertia

• Law of Thermodynamics

What happens to gravitational potential energy as a roller coaster descends?

• It disappears

• It changes into kinetic energy

• It remains constant

• It increases

What is the formula for gravitational potential energy?

• 1/2 MV^2

• MGH

• P x T

• F x D

In physics, when is work said to be done?

• When a force is applied over a distance

• When an object is at rest

• When energy is stored

• When an object is heated

What unit is used to measure work in physics?

• Calories

• Joules

• Newtons

• Watts

What is the relationship between work and energy transfer?

• Work is the destruction of energy

• Work is the creation of energy

• Work is the transfer of energy from one form to another

• Work is unrelated to energy transfer

How is power defined in relation to work?

• Power is the force applied to an object

• Power is the total amount of work done

• Power is the speed at which work is done

• Power is the energy stored in an object

What is the unit of power?

• Calorie per second

• Watt per second

• Joule per second

• Newton per second