Energy & Fields

What is the definition of Work Done?

Work done is the product of the force and the displacement in the direction of the force. It is a scalar quantity. The formula is W=Fd

What is the Principle of Conservation of Energy?

Energy cannot be created or destroyed, only converted from one form to another. The total energy in an isolated system remains constant.

What are the formulas for Kinetic Energy (KE) and Gravitational Potential Energy (GPE)?

How is Power defined?

Power is the rate at which work is done or energy is converted.

What are the two main formulas for calculating power?

What is a gravitational field?

A region of space where a mass experiences a gravitational force.

What is gravitational field strength (g)?

The gravitational force per unit mass at a point.

What is an electric field?

A region of space where an electric charge experiences an electric force.

What is electric field strength (E)?

The electric force per unit positive charge at a point.

What is a magnetic field?

A region of space where a magnetic material or a moving charge experiences a magnetic force.

What is the relationship between work done and change in potential energy?

The work done by a field on an object is equal to the negative of the change in the object's potential energy (W=−ΔU). This means that if the field does positive work, the potential energy of the object decreases.