What is the work-energy principle?

The work-energy principle states that the work done on an object is equal to its change in kinetic energy.

The work-energy principle is a fundamental concept in physics that relates the work done on an object to its change in kinetic energy. Work is defined as the product of force and displacement, and is measured in joules (J). Kinetic energy is the energy an object possesses due to its motion, and is given by the formula KE = 1/2mv^2, where m is the mass of the object and v is its velocity.

According to the work-energy principle, the work done on an object is equal to its change in kinetic energy. Mathematically, this can be expressed as W = ΔKE, where W is the work done on the object and ΔKE is its change in kinetic energy. If the work done on the object is positive, then its kinetic energy increases, and if the work done is negative, then its kinetic energy decreases.

The work-energy principle can be applied to a wide range of physical systems, from simple mechanical systems to more complex systems involving electromagnetic and gravitational forces. It is a powerful tool for analysing the behaviour of physical systems, and is used extensively in engineering, physics, and other fields.