{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

# work - Work The everyday definition of work and the one...

This preview shows pages 1–2. Sign up to view the full content.

Work The everyday definition of “work” and the one that we use in physics are quite different from each other. When most people think about “work” they think of the job that they have. In physics we use two very exact definitions of work. Definition 1: Work is a transfer of energy Definition 2: Work is a force causing an object to have a displacement. Both of these definitions can be seen in the formula on your data sheet: W = ΔE = Fd Notice that both of the definitions are shown in the formula. A transfer of energy means a change in energy ( ΔE ) is happening. It also shows that a force and displacement are happening. Most of the time you don't even have to use the formula this way. You'll also see it on your data sheet as: W = F d W = work (Joules) F = force (Newtons) d = displacement (metres) By definition, 1 J of work is done by applying 1 N of force to move an object 1 m. Work has no direction, so it is a scalar quantity. But, the direction of motion must be in the same direction ( parallel ) as the direction of the force, otherwise no work is being done. Example 1 : I am holding a 2 kg block of cheese in my hands. I walk 12 m to the other side of the room. Explain if I did any work.

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern