PHYS 2001 Lecture : Chap 7 Notes
Document Summary
(cid:1) (cid:2) (cid:3) (cid:4) (cid:5) (cid:2) (cid:3)(cid:5) (cid:6)(cid:7)(cid:8) (cid:9) It"s the stuff that makes stuff do stuff. Energy is a physical quantity that is related to the amount of work done on an. We can harness energy, object and/or the amount of work that object can do. redirect it into different forms, use it to accomplish useful tasks. Let"s first focus on something that we can rigorously define: the work done on an object. Once we know what work is, we can more explicitly define energy: Energy is the ability to do work. (more on this later. ) Work is done by applying a force to displace an object motion is essential. (cid:3) (cid:10) (cid:5) Work is due to (cid:12)(cid:15) (cid:2) (cid:12) (cid:20)(cid:21)(cid:22) (cid:10), the force along d . The units of work are joules (j): (cid:12)(cid:13) (cid:14)(cid:13) (cid:2) (cid:23)(cid:16)(cid:24) (cid:2) (cid:25) Work (cid:11) (cid:2) (cid:12)(cid:13) (cid:4) (cid:14)(cid:13) (cid:2) (cid:12)(cid:15)(cid:16)(cid:14)
