Chapter 6 Notes

# Chapter 6 Notes - The work W done by a constant force...

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

The work W done by a constant force acting on an object is where F is the magnitude of the force, s is the magnitude of the displacement, and θ is the angle between the force and the displacement vectors. Work is a scalar quantity and can be positive or negative, depending on whether the force has a component that points, respectively, in the same direction as the displacement or in the opposite direction. The work is zero if the force is perpendicular θ = 90 ° to the displacement. The kinetic energy KE of an object of mass m and speed v is The work– energy theorem states that the work W done by the net external force acting on an object equals the difference between the object's final kinetic energy KE f and initial kinetic energy KE 0 : W = KE f - KE 0 . If the net force does positive work, the kinetic energy increases; if the net force does negative work, the kinetic energy decreases. The work done by the force of gravity on an object of mass m is where h 0 and h f
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