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Physics on Deck

Physics on Deck. January 2008. January 6, 2010. What’s up? For the short term: Chapter 5. Work and Power. Conservation of momentum Circular or Rotational Motion . Radians, anyone? Universal Gravitation. Conservation of Momentum. And then. We start the second term: Wave mechanics

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Physics on Deck

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  1. Physics on Deck January 2008

  2. January 6, 2010 • What’s up? • For the short term: Chapter 5. Work and Power. • Conservation of momentum • Circular or Rotational Motion . Radians, anyone? • Universal Gravitation. • Conservation of Momentum

  3. And then.. • We start the second term: • Wave mechanics • Sound • Light • Optics • Electrical fields • Electrical circuits • Magnetism • Quantum Physics • Relativity

  4. January 7

  5. January 12

  6. January 14

  7. Thursday, February 4 • Quiz: Angular and tangential velocity and acceleration. • New discussion: Centripetal force • Video: Kepler’s Laws. • Assignment: 7G and 7H

  8. Monday, February 8

  9. 2009-2010

  10. January 19 • Last of workbook assignments due. • Finish quiz on Collisions at an angle. • Finish lab on Conservation of Momentu-internal force. • Do lab on Conservation of momentum – collisions at an angle. • Thursday Jan 21: Test Chapter 6

  11. So for today… • Work and Power • Assignment: 5A and 5B

  12. January 7, 2009 • Teacher absent. • Quiz: Work and Power • Bonus: Meet the neighbors • Homework: 5F

  13. January 9, 2009 • Assignment due: 5F Power • New discussion: Work – Potential Energy – Kinetic Energy theorem. • Assignment: 5B and 5C

  14. January 13, 2009 • Assignment due: 5B, 5C • Quiz: Work, power, Kinetic and Potential energy. • Video: Conservation of energy • Assignment due next time: 5D, 5E

  15. Impulse momentum theorem • A mass of 10.0 kg is accelerated from 5 m/s to 12 m/s in 2 seconds. Calculate the change in momentum, the impulse required, the force that must be applied and the distance traveled in this event.

  16. Linear collision • Glider A of mass 0.355 kg moves along a frictionless air track with a velocity of 0.095 m/s. It collides with glider B of mass 0.710 kg moving in the same direction at a speed of 0.045 m/s. After the collision, glider A continues to move in the same direction but with a velocity of 0.35 m/s. What is the velocity of B after the collision? Review this problem in 2009

  17. Collisions at an angle. • Sample problem 2. • A 0.5 kg ball collides with another ball at rest of mass 1.0 kg. After the collision, the 1.0 kg ball moves away at an angle of 60o with a velocity of 2.0 m/s. The 0.5 kg ball rolls at an angle of 135 at 3.0 m/s. What was the momentum of the 0.5 kg ball before the collision?

  18. Collisions at an angle.. • Sample problem 1 • Two bicyclists approach an intersection, one from the east with a mass of 110 kg and one from the south with a mass of 140 kg and is traveling at 25 m/s. They collide and the bicycles become locked together. The two move and an angle of 300o. What was the speed of the 110 kg cyclist?

  19. Collisions at an angle • Sample problem • An object of mass 15.0 kg and a velocity of 2.00 m/s collides with a stationary object having the same mass. After the collision, the first object moves along a line that makes an angle of 400 to the right of the original path. The second object moves at an angle of 100o to the left of the path of the first object after the collision. A) Determine the momentum of each object after the collision. B) Calculate the speed of each object after the collision.

  20. Wednesday, January 28 • Assignment due: 6A • Review discussion: Momentum and change of momentum./ • New discussion: Linear collisions. • Assignment: 6B and 6D

  21. Friday, January 30 • 6B and 6D due • Quiz: Momentum, change in momentum, linear collisions. • Discussion: Stopping distance. Collisions at an angle. • Lab: Conservation of Momentum • Tuesday: Part II : 4 problem test on Chapter 5.

  22. Sample problem • Stopping distance. • A 2500 kg car traveling to the north is slowed down uniformly from an initial velocity of 20.0 m/s bya 6250 N braking force acting opposite the car’s motion. Use the impulse momentum theorem to answer the following questions: • A. What is the car’s velocity after 2.50 seconds? • B. How far does the car move during the 2.50 seconds? • C. How long does it take the car to come to a complete stop?

  23. Tuesday, February 3 • Retake of test – problem section • 6C due

  24. Thursday, February 5 • Lab: Conservation of momentum – Collision in 2 dimensions report due Monday Feb. 9 • Quiz: Conservation of Momentum • Notes: Conservation of energy and momentum; elastic and inelastic collisions. • Lab: Conservation of Momentum – internal force.

  25. Internal force • An astronaut at rest in space with a mass of 84 kg fires a thruster that expels 85 g of hot gas at 875 m/s. What is the velocity of the astronaut after firing the shot?

  26. Explosions – internal force • An explosion blows a rock into three parts by internal force. Two pieces go off at right angles to each other; a 1.0 kg piece at 12 m/s and a 2.0 kg piece at 8.0 m/s. The third piece flies off at 40 m/s. What is the mass of the third piece? What was the mass of the rock?

  27. Monday, January 28 • Intro to circular motion. • Rotational kinematics and radians; angular displacement, angular velocity, angular acceleration. • Assignment due Wednesday 7A, 7B • Assignment due Friday 7C • Assignment due Tues, Feb 5 7D

  28. Tuesday, March 3 2009 • One more quiz on Circular Motion • More on Kepler…. • Law of Universal Gravitation • Understanding the concept – formula work • TEST: Thursday Chapter 6 and 7.

  29. Thursday, March 5 2009 • TEST: Momentum and circular motion

  30. Monday, March 9 • Assignment due: Parachutes and terminal V. • Class discussion: Torque and equilibrium of torque. • Classwork problems • Assignment 8A – due Friday.

  31. Wednesday, March 11, 2009 • Video: Torque • Quiz: Torque • Discussion: Equilibrium of Forces. • Classwork: Problems on equilibrium of forces. 8B due Friday. • Postpone Pendulum lab until Friday.

  32. Friday, March 13 • Teacher absent. • Video: Torque • Lab: Pendulum. Submit with pendulum problems. Done and submitted in class. • Discuss: Factors that affect the behavior of a pendulum. • Classwork: Problems on equilibrium of forces.

  33. Tuesday, March 17 • Quiz: Torque • Discussion: Wave-Mechanics and Sound. Notes • Next Thursday: Lab: Wave Mechanics

  34. Thursday, March 19 • Lab: Properties of waves.

  35. Monday, March 30 • Notes: Characteristics of waves. Sound. • Video: Understanding Time. (53 minutes) • Assignment: Bonus. Ocean Waves – due Friday, April 3 • Waves and Sound: Exercises 1-4 and Additional Exercises 1-5

  36. Wednesday, April 1 • New quiz on Torque • Notes/discussion. Sound Intensity and the Decibel scale.

  37. Friday, April 3 • Quiz: Sound • New discussion: Decibel scale/Doppler effect. • Problems due: Sound worksheet #2

  38. Tuesday, April 7 • Quiz: Doppler effect, beats, decibel scale. • Intro to Light unit • Set up Ripple tanks.

  39. Wednesday, April 8 • Finish lab on Waves in a Ripple Tank. • Test: Wave Mechanics and Sound on • Tuesday April 14

  40. Tuesday, April 14 • Unit test: Wave Mechanics and Sound • Lab: Images from flat mirrors

  41. Thursday, April 16 • Assignment due: #13 Reflection and Refraction #1-4 • Finish lab on Flat Mirrors. • Begin lab on Curved Mirrors.

  42. Tuesday, April 21 • New discussion/Review : Finding images using diagrams. • Finding images using the Mirror Equation. • Finish lab: Curved Mirrors • Assignment for April 27. 14B and 14C. • Quiz: Mirrors

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