Home Physics Work Energy and Power

Work Energy and Power

Work done by a constant force and a variable force; kinetic energy, work-energy theorem, power. Notion of potential energy, potential energy of a spring, conservative forces: conservation of mechanical energy (kinetic and potential energies); non-conservative forces: motion in a vertical circle; elastic and inelastic collisions in one and two dimensions.

Inelastic Collision

During a collision between two bodies if there is a loss of kinetic energy, then the collision is said to be an inelastic collision. In...

Collisions

Collision between two or more particles is the interaction for a short interval of time in which they apply relatively strong forces on each...

Conservative Forces

Forces are said to be conservative in nature if work done against the forces gets conversed in the body in form of potential energy....

Power

Power is defined as the time rate at which work is done or energy is transferred. The average power of a force is defined as...

Conservation of Mechanical Energy

The total mechanical energy of a system is conserved if the forces, doing work on it, are conservative. Suppose that a body undergoes displacement Δx...

Potential Energy of a spring

Energy possessed by the spring by virtue of compression or expansion against elastic force in the spring is known as elastic potential energy or...

Potential Energy

Potential energy is the ‘stored energy’ by virtue of the position or configuration of a body. The body left to itself releases this stored...

Kinetic Energy

If an object of mass m has velocity v, its kinetic energy K is Kinetic energy is a scalar quantity. The kinetic energy of an...

Work-Energy Theorem

The work-energy theorem states that the change in kinetic energy of a body is the work done by the net force on the body. Kf...

Work

Work is related to force and the displacement over which it acts. Consider a constant force F acting on an object of mass m....