PHYS UN1401 Lecture Notes - Lecture 10: Fiz Brown, Xz, Weak Interaction
Document Summary
If a force f moves an object through a distance d in the direction of work is done on the object the force , Fd ( w ) = if ] ( d ) = nm = joule j. If the direction of motion opposes the force , the work done is negative. W = f. d- = fd cos 0. Imagine i have a mass m that starts with velocity v : for a distance d on this object . Vf = vi t at vt- = t x - x o. = d = vit t eat a d-- uinta + z a (vt. D= vt vi - vi a- a- t ta ( ve "t vi - 24. W = kt - ki work done on mass = change in its kinetic energy. Force f = f ( x ) variable force. Work done to move the body from x to xtdx.