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Physics 2053C – Fall 2001

Physics 2053C – Fall 2001. Motion, Energy, Waves & Heat. Course Organization. Lecture: Monday, Wednesday and Friday 10:10 to 11:00 Quizzes during Wednesday AM Tutorials: Monday: 12:00 – 3:00 Tuesday: 9:00 – 12:00 Labs: Tuesday or Thursday afternoons evenings.

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Physics 2053C – Fall 2001

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  1. Physics 2053C – Fall 2001 Motion, Energy, Waves & Heat Dr. Larry Dennis, FSU Department of Physics

  2. Course Organization • Lecture: • Monday, Wednesday and Friday 10:10 to 11:00 • Quizzes during Wednesday AM • Tutorials: • Monday: 12:00 – 3:00 • Tuesday: 9:00 – 12:00 • Labs: • Tuesday or Thursday afternoons evenings

  3. Why do you need to understand Physics? • Foundation on which all modern science is built – and it is becoming more and more important. • Useful for almost all careers. • Teaches a particular way of addressing problems and observing the environment. • Helps you understand what is possible.

  4. Units • Physical measurements require: • units • a frame of reference 500 500 meters 500 meters south of the dock

  5. Conversion of Units 1 in = 2.54 cm = 0.0254 m = 0.0833 ft = 1.58 x 10-5 mi 70 mph = 70 mi/hr = 70 mi/hr x 5280 ft/mi x 1 hr/3600 sec = 70 x 5280 / 3600 x mi/hr x ft/mi x hr/s = 103 ft/s = 103 ft/s x 12 in/ft x 0.0254 m/in = 31.4 m/s (also 113 km/hr)

  6. Kinematics • Motion in 1-D. • Free fall. • Along a road. • Displacement. • Velocity. • Acceleration.

  7. Average Velocity = distance traveled elapsed time = 6 km – 3 km + 5 km 2 hr + 1 hr + 2 hr = 8 km/5 hr = 1.6 km/hr 6 km in 2 hours 3 km in 1 hour 5 km in 2 hours Average Velocity

  8. Average Acceleration Average Acceleration = change in velocity elapsed time aave = ( v2 – v1 ) = v ( t2 – t1 ) t ains = limit v t -> 0t

  9. x (m) t (s) Motion at Constant Acceleration x = x0 + v0 t + ½ a t2 v2 = v02 + 2 a (x – x0) v = v0 + a t

  10. Sample Problem • How fast is he moving at the end of 5 seconds? • How far has he gone in the 5 seconds? • What is his average speed for the 5 seconds? • How far does he go between 5 and 10 seconds? • What is his average velocity over 10 seconds? A police car starts from rest and accelerates at a constant rate of 3 m/s2 for 5 seconds and then continues moving with constant speed.

  11. Next Time • Read Chapter 1 & 2. • Start CAPA – you must get a CAPA id to be able to do your homework. • No tutorial on Monday. • See me with any questions or comments. See you Wednesday.

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