Chapter 14 Work, Power and Simple Machines. Questions to think about before…. What does work mean to you??? List some examples of work:. Is this work???. Work & Science. Now...think about work in terms of science...it probably means something very different than what you listed above.
Question: Does a weight lifter do work on the barbell to lift it over his head?
Work = 1600 N x 2.0 m
Work = 3200 N m = 3200 J
Power = work / time
OR can be written as:
Power = (Force x Distance) / Time
(72 N x 1.0 m)/ 2.0 s = 36 J/s = 36 Watts
They can’t do work for us!
KE = ½ mv2
Show your work here:
The gravitational PE of an object is converted to the KE of motion as the object falls.
(KE + PE)beginning = (KE + PE)end