Work Energy Theorem Examples Pdf

The work done by a resultant force is equal to the change in kinetic energy that it produces.

Work energy theorem examples pdf.

The work energy theorem work is equal to the change in mv2 if we define kinetic energyas mv2then we. Gravity performs negative work on a ball tossed up by transferring energy from the ball causing the ball to slow down. Up to page 88 in the text book ch.

6 finish newton s laws and circular motion energy work definition examples of work work and kinetic energy conservative and non conservative forces work and potential energy conservation of energy. W g w n w f k f k i. Work energy and power tuesday february 10th reading. K k f k i w in the above example with the ball falling from a.

The work energy theorem states that the net work done on an object by the net force is equal to the change in kinetic energy of the object. The work done is equal to the change in the kinetic energy. W n work done by a normal. J work energy theorem.

Therefore the change in the car s kinetic energy is equal to the work done by the frictional force of the car s brakes. The term work is used in everyday life quite frequently and we understand that it s an act of doing something. The principle of work and kinetic energy also known as the work energy theorem states that the work done by the sum of all forces acting on a particle equals the change in the kinetic energy of the particle. We apply the work energy theorem.

Friction or air resistance present then the system is not closed and the mechanical energy of the system will change. Then we can state a very important physical principle. We know that all the car s kinetic energy is lost to friction. Therefore we first need to determine the car s kinetic energy at the moment of braking using.

Both kinetic energy and work are scalars. 1122 work 22 mv f mv 0. The work energy theorem explains the reasons behind this physics of no work. Where w g work done by gravity.

This definition can be extended to rigid bodies by defining the work of the torque and rotational kinetic energy. The work energy theorem is useful however for solving problems in which the net work is done on a particle by external forces is easily computed and in which we are interested in finding the particles speed at certain positions of even more significance is the work energy theorem as a starting point for a broad generalization of the concept. For example you are working right now on your grasp of physics by reading this article.