PHYS 101 Lecture 1: 1-8
20 May 2022
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Displacement changeinposition velocity rate of changeof position mls re. Vy voy 2g y yo velocity as afunction velocity of position speedof anobjectmayn ord but never constant. Free fall ay g velocity 9 neg if obj dropped from rest. Size magnitude direction velocity acceleration force x and y directions independent. Projectile motion vector magnitude iai fatty vector direction described by angle o tan ai. Uniform circularmotion constantspeed if object moves wi constantspeed v in perfect circle ofradius r velocity vector constantly changing direction speed constant must be accelerating. Magnitude of acceleration is a directedtowardscenter of circle. 1stlaw if o net force on an object speedldirection won"tinonge. 2nd law if nonzero net force acts on an object itsmotion willchange according to 7 fret ma. Forcesthatrezppinteracting objects exert on each other areequal andopposite. Two boxesconnected by a stringover a frictionless pulley boxi m t. sk box 2 mz 2. 5kg box 2 starts fromrest 0. 8m abovetable how long to hit the table.
