# Ex_work - Work 1 Work done by a constant force in 1-D...

This preview shows page 1. Sign up to view the full content.

Work 1. Work done by a constant force in 1-D motion: cos t W F s F s F s φ = = = i G G W = F s if the force and displacement have the same direction, W = F s if they have opposite directions. 2. Work done by a varying force or work done by a force in 2-D motion: t W F d s F d = = s i G G ) g y y 3. Work done by gravity for motion from position 1 to position 2: W m 1 2 ( g = gs . If the displacement is along an incline: W m sin g θ = gs for down the incline and W m sin g = θ x x = s for up the incline. 4. Work done by a linear spring for motion from position 1 to position 2: W k 2 2 1 2 (1/ 2) ( ) s 5. Work done by friction: W N f k μ = − Example 1. A force F = 200 N is applied on the 20 Kg block that is attached
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