Physics Energy Exam Review

Front

What is the equation for work done when a force is applied over a distance?

Back

W = F * d, where W is work, F is force, and d is distance.

Front

What is mechanical energy?

Back

Mechanical energy is the sum of potential energy and kinetic energy in a system.

Front

What two variables are needed to calculate work?

Back

Distance and force.

Front

How do you calculate average power?

Back

Average power is calculated as Power = Work / Time.

Front

What is the average power output if 6000 J of work is done in 2 seconds?

Back

3000 W.

Front

What energy transformation occurs when lighting a gas burner?

Back

Chemical energy is transformed into thermal energy.

Front

Define kinetic energy.

Back

Kinetic energy is the energy of an object due to its motion, calculated as KE = 1/2 mv², where m is mass and v is velocity.

Front

Define potential energy.

Back

Potential energy is the stored energy of an object due to its position or state, commonly gravitational potential energy, calculated as PE = mgh, where m is mass, g is gravitational acceleration, and h is height.

Front

What is the principle of conservation of energy?

Back

The principle states that energy cannot be created or destroyed, only transformed from one form to another.

Front

What is the difference between renewable and non-renewable energy sources?

Back

Renewable energy sources can be replenished naturally (e.g., solar, wind), while non-renewable sources exist in finite amounts (e.g., fossil fuels, nuclear).