Physical Science Energy Review

Front

What is power in physics?

Back

Power is the rate at which work is done or energy is transferred over time. It is measured in watts (W).

Front

How do you calculate work done?

Back

Work done (W) is calculated using the formula: W = Force (F) x Distance (d). It is measured in joules (J).

Front

What is mechanical energy?

Back

Mechanical energy is the sum of potential energy and kinetic energy in an object. It is the energy associated with the motion and position of an object.

Front

What is the principle of conservation of mechanical energy?

Back

The principle states that in a closed system, the total mechanical energy remains constant if only conservative forces are acting.

Front

What is the difference between kinetic energy and potential energy?

Back

Kinetic energy is the energy of an object in motion, while potential energy is the stored energy of an object due to its position or state.

Front

What is the formula for kinetic energy?

Back

Kinetic energy (KE) is calculated using the formula: KE = 1/2 mv², where m is mass and v is velocity.

Front

What is the formula for potential energy?

Back

Potential energy (PE) is calculated using the formula: PE = mgh, where m is mass, g is acceleration due to gravity, and h is height.

Front

What is energy transformation?

Back

Energy transformation is the process of changing energy from one form to another, such as electrical energy to mechanical energy.

Front

What is the unit of energy?

Back

The unit of energy is the joule (J).

Front

What is the relationship between work and energy?

Back

Work done on an object results in a change in energy of that object. Work transfers energy from one system to another.