#### Definition of Work-Energy Theorem

The work done on a rigid body by a net force changes the energy of the body.

W = E_{kfinal} - E_{kinitial} = (0.5)m(v_{final})^{2} - (0.5)m(v_{initial})^{2}

W = Fdcosø

When the energy of the body increases, work is positive.

#### Work-Energy Theorem in Physics Problems

Work-Energy Theorem Problems