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Unit 2, Day 19

Unit 2, Day 19. Review. Review Activities. Free Body Diagrams (Notes) Class Work Whiteboard Review Break Whiteboard Review. Free Body Diagrams. #1: Applied Force Force put on object by person Direction of force causes movement in SAME direction. Free Body Diagrams.

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Unit 2, Day 19

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  1. Unit 2, Day 19 Review

  2. Review Activities • Free Body Diagrams (Notes) • Class Work • Whiteboard Review • Break • Whiteboard Review

  3. Free Body Diagrams • #1: Applied Force • Force put on object by person • Direction of force causes movement in SAME direction

  4. Free Body Diagrams • #2: Force of Gravity (Weight) • Force the earth attracts an object with • Always points “down” towards earth

  5. Free Body Diagrams • #3: Normal Force • Always perpendicular and upward from surface • Newton’s 3rd Law: Equal and Opposite

  6. Free Body Diagrams • #4: Friction Force • Force made AGAINST object’s movement along the surface

  7. Free Body Diagrams • A book is at rest on a table top.

  8. Notes • If there is no acceleration, opposing forces should be equal! • No Acceleration • Constant Velocity • Rest

  9. Free Body Diagrams • A girl is holding onto a rope from the ceiling motionless.

  10. Free Body Diagram • An egg is free-falling from a nest in a tree. Neglect air resistance.

  11. Free Body Diagram • An egg is falling (not freely, do not neglect air resistance) from a nest in a tree.

  12. Free Body Diagram • A rightward force is applied to a book in order to move it across a desk with a rightward acceleration. Include friction.

  13. Free Body Diagram • A rightward force is applied to a book in order to move it across a desk at constant velocity. Include friction.

  14. Free Body Diagram • A car is parked on a sloped street.

  15. Free Body Diagram • A hot air balloon is accelerating upward. Include air resistance.

  16. Free Body Diagram • A car is coasting (the driver is not touching the pedals) to the right and slowing down.

  17. Break

  18. Whiteboard Review • 60 seconds to make a school appropriate name • Don’t just use your initials • Don’t shout out answers • Wait for 5-4-3-2-1 • You may use notes

  19. #1 • Distance, speed, and mass are examples of _________.

  20. #2 • Displacement, velocity, acceleration, and force are examples of ____________.

  21. #3 • A scalar has which of the following? • Measurement • Direction • Letter without an arrow • Letter with an arrow

  22. #4 • Draw the xy coordinate graph. Show: • Which axis is X? Which axis is Y? • Which way is positive, which way is negative?

  23. Switch!

  24. Practice • Mrs. Larkin runs forward 10 feet. She then turns around and runs back 7 feet. What distance did she run?

  25. Practice • Mrs. Larkin runs forward 13 feet. She then turns around and runs back 6 feet. What displacement did she run?

  26. Switch!

  27. Practice • Shadow runs 3 meters east, then 2 meters north, then 3 meters west. What distance did she run?

  28. Practice • Shadow runs 4 inches north, then 5 inches east, then 4 inches south. What displacement did she run?

  29. Switch!

  30. Practice • Ms. Parsons drives to and from Da Vinci Design, which is located 5 miles from her house. • A. What is the total distance she drives every day? • B. What is her displacement every day?

  31. Practice • La Luz runs a complete circle around the classroom. What displacement did she run? (Use feet)

  32. Switch!

  33. Practice • La Luz and Shadow are racing each other around a circular track. The track is 500 meters around and 159 meters across. La Luz gets tired and stops halfway around. Shadow finishes the race. • A. Who has the greater displacement? • B. By how many meters? 500 meters around 159 metersacross

  34. Practice • La Luz and Shadow are racing each other around a circular track. The track is 500 meters around and 159 meters across. La Luz gets tired and stops halfway around. Shadow finishes the race. • A. Who ran the greater distance? • B. By how many meters? 500 meters around 159 metersacross

  35. Switch!

  36. Practice • Which of the following are units for velocity? • meters/second2 • meters/second • feet/hour • miles • kilometers/minute

  37. Practice - Whiteboards • Running 59.8 miles in 2 hours When finished with whiteboards, get this problem into notebooks

  38. Switch!

  39. Practice - Whiteboards • Running 150.6 kilometers in 3 hours When finished with whiteboards, get this problem into notebooks

  40. Question • Give an example of the units for acceleration using feet and seconds.

  41. Switch!

  42. Question • What are the two equations involving acceleration?

  43. Question • As a school bus slows to a stop, it slows from 9.00 m/s to 0.00 m/s in 5.00 seconds. What is its acceleration?

  44. Switch!

  45. Question • A skateboarder goes from a standstill to a speed of6.7 m/s in 12 seconds. What is their acceleration

  46. Question • A sprinter increases from 5.0 m/s to 7.5 m/s over a period of 1.25 seconds. What is their acceleration?

  47. Switch!

  48. Whiteboard Activity • A 1200 kg car is driving at 10 m/s. When it reaches a new speed limit sign, it accelerates to a speed of 35 m/s. The car is able to reach this speed within a span of 13 meters. • What is the car’s average velocity?

  49. Switch!

  50. Whiteboard Activity • A 1200 kg car is driving at 10 m/s. When it reaches a new speed limit sign, it accelerates to a speed of 35 m/s. The car is able to reach this speed within a span of 13 meters. • What is the car’s change in time?

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