Energy, Work and Power

Front

What is kinetic energy?

Back

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

Front

What is potential energy?

Back

Potential energy is the energy stored in an object due to its position or state. For example, an object at a height has gravitational potential energy.

Front

How do you calculate kinetic energy?

Back

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

Front

What happens to potential energy as an object falls?

Back

As an object falls, its potential energy decreases while its kinetic energy increases, assuming no energy is lost to air resistance.

Front

At what point is kinetic energy equal to potential energy for a falling object?

Back

Kinetic energy and potential energy are equal halfway down the fall, assuming no air resistance.

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 is done when energy is transferred from one system to another. The work done on an object is equal to the change in its energy.

Front

What is the formula for calculating work?

Back

Work (W) is calculated using the formula W = Fd, where F is the force applied and d is the distance moved in the direction of the force.

Front

What is the principle of conservation of energy?

Back

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

Front

How does mass affect kinetic energy?

Back

Kinetic energy is directly proportional to mass; as mass increases, kinetic energy increases if velocity remains constant.