Top 15 Things You Should Know For Your Final Exam

1. Top 15 Things You Should Know For Your Final Exam Physics – Spring 2012

2. #15 – Weight vs. Mass = mg

3. #14 – Don’t overuse v=d/t! • Only when acceleration = 0 m/s2

4. #13 – Types of Equilibrium • Static – not moving • Dynamic – moving at a constant velocity

5. #12 – Electric Charge • q – test charge • Always positive • E = Fe / q • Q – source charge • E = kQ / d

6. #11 – Metric Conversions • 1 km = 1 x 103 m • 1 cm = 1 x 10-2 m • (100 cm = 1 m) • 1 μm = 1 x 10-6 m • 1 nm = 1 x 10-9 m

7. #10 – Electric Circuits • Series • Rtotal= R1 + R2 + R3 • Same current • Different voltage • Parallel • 1/Rtotal= 1/R1 + 1/R2 + 1/R3 • Same voltage • Different current

8. #9 – Impulse and ∆p

9. #8 – Period vs. Frequency • Period • T = time/cycles • Unit: seconds • Frequency • f = cycles / time • Unit: hertz

10. #7 – Mechanical Energy

11. #6 – Middle of the Hill Problems

12. #5 – Don’t forget negatives!

13. #4 – Kilowatt-Hours • Unit of energy (not power!) • P = IV (Watts = Amps*Volts) • Convert Watts to Kilowatts • Convert Seconds to Hours • E = Pt (Kilowatts = Kilowatts*Hours) • Determine price per kw*h

14. #3 – According to Coulomb’s Law, electrostatic forces are indirectly proportional to d2

15. #2 – Only forces on a FBD!

16. #1 – Take your time 