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Conservation of Information

Conservation of Information. -a test of memory power Jeniece, Lauren, and Steph. Instructions…. You will be given 9 minutes to study all of the information on the next 2 slides When time is up…you take the quiz for 5 mins. 1min. to check your answers.

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Conservation of Information

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  1. Conservation of Information -a test of memory power Jeniece, Lauren, and Steph

  2. Instructions… • You will be given 9 minutes to study all of the information on the next 2 slides • When time is up…you take the quiz for 5 mins. • 1min. to check your answers

  3. Just some examples from the Real World… • Roller coasters • Pendulums • A ball in a half pipe • A free falling object

  4. Impulse=force x time Total Energy=Kinetic Energy +Potential Energy Kinetic Energy=1/2 mv2 Potential Energy=mgh Work=force x distance work unit=Joules Power=work/time power unit=Watts 1Joule of work=1Newton of energy in 1meter Energy unit=Newton/meter KEi + PEi = KEf + PEf work is done: against another force or to change an obj. speed running & walking use same amt. of work power is the rate that work is done PE is present in chemical changes 2x speed = 4x KE 2x distance = 2x force 4x work = 2x speed Law of Conservation of Energy= energy can’t be destroyed or created, only changed to other forms You now have 6 minutes…TO CRAM!!!

  5. Here’s how it’s done. If a 5 kg ball is dropped from 10 m off the ground, what is the velocity at the bottom of the path? m= 5 kg Pei + Kei = Pef + KEf d= 10 m 5(9.8)(10) + 0 = 0 + ½ (5) v2 g= 9.8 m/s/s 490 = 2.5v2 KE= 0 J v2 = 196 Pef= 0 J v= 14 If it takes Tom 2 minutes to climb a stair case 20 m high, and Tom weighs 90 kg, how much work is done and how much power is outputted? W=mgd P= W/t W= ?W=90(9.8)(20)P=?P= 17940 m= 90 kgW= 17640 JW= 17640 J120 s g= 9.8 m/s/st= 2 min. (120 s)P= 147 W d= 20 m

  6. Answers to your quiz. • a. –PE = 1440.6 J b. v = 11.7 m/s • a. PE = 3160.5 J b. 15.01 m/s • a. W = 735 J b. P = 4.1 W • a. W = 8467.2 J b. 11.76 W • a. 13230 J b. v = 24.24 m/s

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