# MCAT Phys

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 Author: nextMD ID: 191791 Filename: MCAT Phys Updated: 2013-01-10 11:40:44 Tags: MCAT Phys Chapter Folders: Description: MCAT Phys Chapter 2 Show Answers:

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1. pico - p
10-12
2. nano - n
10-9
3. micro -
10-6
4. milli - m
10-3
5. centi - c
10-2
6. kilo - k
103
7. mega - M
106
8. giga - G
109
9. Displacement
• position = positionfinal - positioninitial
• Vector (magnitude and direction)
• net distance traveled, regardless of path taken
• units = meters
10. average velocity
• = displacement/time
• v = x/t
• v = d/t
• Vector (magnitude and direction)
• units = m/s
11. Speed
• Total distance traveled/time
• Scalar (magnitude only)
• Can never be negative
• units - m/s
12. pythagorean theorem
• c= a2 + b2
• 5 = 3 + 4
• 13 = 5 + 12
13. acceleration
• change in velocity/time
• a = v/t
• object can accelerate even if speed is constant
• Vector (magnitude and direction)
• units = m/s2
14. Big Equations - assuming acceleration is constant
• x = xo + vo + 1/2at2
• v = v+ at
• v2 = vo2 + 2ax
• x = xo +vot

15. slope of a x vs t graph
gives velocity
16. slope of a v vs t graph
gives acceleration
17. area under v vs t graph
gives displacement
18. Sin 0
0
19. Sin 30
• 0.5
• 1/2
20. Sin 45
• 0.71
• 1/
21. Sin 60
• 0.87
• /2
22. Sin 90
1.0
23. Sin 180
0
24. Cos 0
1.0
25. Cos 30
• 0.87
• /2
26. Cos 45
• 0.71
• 1/
27. Cos 60
0.5
28. Cos 90
0
29. Cos 180
-1.0

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