PHYS 1501Q Lecture 14: PHYS 1501Q - Lecture 14 - Work and Kinetic Energy

• School: UConn
• Department: Physics
• Course: PHYS 1501Q
• Professor: Soroush Khosravi Dehaghi, Robert McCutcheon

Document Summary

Physics 1501q - lecture 14 - work and kinetic energy 9/26/18. Key (in si units): t = time (s) x = distance (m) v = velocity (m/s) a = acceleration (m/s 2 ) = change in g = gravity = 9. 81 m/s 2 m = mass (kg) = coefficient of friction k = spring constant. Where a and b are vectors and | a | and | b | are the magnitudes of those vectors. If f is changing, a general form for the work equation is: The work done by weight near the surface of the earth can be determined as: The only component that does work is the one in the direction of the displacement. Diagram of how the angle between the force vector and the direction vector affects the sign of the work value. 2 ) (source: slide 7 of 9/26/18 lecture slides https://lms. uconn. edu/bbcswebdav/pid-2546421-dt-content-rid-38542398_1/courses/1188-uco.