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PHY 101 notes

# PHY 101 notes - PHY 101 9/1 Speed average instantaneous...

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PHY 101 9/1 Speed –average - instantaneous velocity vector acceleration –average - due to gravity v=s=d/t a=change in V/t average speed –s -s = d/t total distance traveled over time elapsed distance =1/2 acceleration * time (squared) falling distance d= initial distance + initial velocity*time+1/2 acceleration * time squared acceleration of gravity: 9.8 m/sec2 initial velocity: v o or v I instantaneous speed: speed at any moment in time velocity: speed with direction, a “Vector” quantity vector has magnitude –size, how large AND direction acceleration: change in v with time average acceleration a= change in v over change in t 09/03/09 d=v/t d=1/2(a)(t2) v= d/t v=change d/change t

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9/22 EXAM ALL MECHANICAL OR THERMAL ENERGY Exam equations on one side Need calc, pencil Energy can be neither created nor destroyed, but only transformed from one form to another Temp – Average KE of the atoms and molecules comprising the object Thermometer – Celsius, Kelvin, and Farenheidt Kelvin’s zero is impossible, 0 C = 273 K
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