Energy, Work, and Power

Energy is the ability to do work or cause change. It exists in various forms, such as kinetic, potential, thermal, and chemical energy.

Work is done when a force causes an object to move. It is calculated as the product of the force and the distance moved in the direction of the force (Work = Force x Distance).

Power is the rate at which work is done or energy is transferred. It is calculated as Power = Work / Time.

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

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

Work done against gravity can be calculated using the formula Work = Force x Height, where Force is the weight of the object (Weight = mass x gravity).

Kinetic energy is directly proportional to mass. If the mass of an object increases while its speed remains constant, its kinetic energy increases.

The formula for calculating Kinetic Energy is KE = 1/2 mv².

The formula for calculating Potential Energy is PE = mgh.

If the speed of an object doubles, its kinetic energy increases by a factor of four, since KE is proportional to the square of the velocity.