5-1 Work And Machines

Work and Machines What is Work?

Chapter 5 Section 1

The Meaning of Work Work- a force is exerted on an object that sets the object in motion.  In order for you to do work on an object, the object must move some distance as a result of your force  The force you exert must be in the same direction as the object’s motion  Work is most efficient when you exert a force in the direction of the object’s motion 

Calculating Work Amount of work done on an object depends on the amount of force exerted and the distance the object moves  Work = Force x Distance  Joule (J) = Newtons x meters (work)  100 Joules = 100 N x 1 m  200 J = 100 N x 2 m 