PHYS124 Chapter Notes - Chapter 7 & 8: Friction, Conservative Force, Fruit Preserves

• School: University of Alberta
• Department: Physics
• Course: PHYS124
• Professor: Sharon Morsink

Document Summary

Read her notes, read three online textbook notes, (read over textbook shiz), type as you go on word document, formula sheet, homework questions, confusing concepts, practice exams, Write separately on rough formula sheet, and write extra notes on word doc. Work = force (vector) * displacement (vector) to displacement (not orthogonal, meaning right angle: ex. Pushing car (work against friction), climbing hill (work: not possible to do work if object is at rest bc no against gravity) One end of box to other ned of box. =0 (normal force, tension with string around circle) If f> and d> are in opp directions: cos 180 = -1 (-w = -fd) work done is negative (kinetic friction force wfk = -fkd always negative and always this formula) *work is scalar (always add still use positive and negative numbers), such as for friction (friction always acts in opposite direction to displacement)