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Place HW on your desk! Bell Ringer

This lesson discusses distance, displacement, time, speed, velocity, and formula applications using examples and the GUESS method in physics. Practice problems included.

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Place HW on your desk! Bell Ringer

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  1. Place HW on your desk!Bell Ringer Using the following graph, what is the formula for velocity? Using the following graph, what is the formula for speed? Distance Displacement Time Time

  2. Speed Velocity Speed = Distance Time Velocity = Displacement Time d d t t V S

  3. The GUESS Method • When solving word problems, the GUESS method is a helpful way to organize your information and show all of your work!!

  4. Practice Problem • A car is traveling at an average speed of 15 m/s for 48 seconds. How far has the car traveled? Speed:15 m/s Time: 48 sec How far? Distance: _____meters Distance: 720 meters 15 m/s x 48 s x

  5. Practice Problem • An air plane is traveling 2218 km southeast from Chicago to Miami. If it takes the plane 2.6 hrs, what is the average velocity of the plane?

  6. Practice Problem • A roller blader is traveling 6 miles/hr East towards the school. If he is 3.0 miles away from the school, how long is it going to take him to get to the school?

  7. Practice Problem • Jessica travels 3 miles East to the store to buy some OHS spirit wear. She then travels 2.5 miles West to her friend’s house. The total trip takes Jessica 0.9 hrs. • What is her average speed over the entire trip? • What is her average velocity over the entire trip?

  8. Bell Ringer • Jessica travels 3 miles East to the store to buy some OHS spirit wear. She then travels 2.5 miles West to her friend’s house. The total trip takes Jessica 0.9 hrs. • What is her average speed over the entire trip? • What is her average velocity over the entire trip?

  9. The GUESS Method • When solving word problems, the GUESS method is a helpful way to organize your information and show all of your work!!

  10. Review • This graph shows an object that is: • moving forward quickly, speeds up, then backwards, then stops • Speeding up, stopping, slowing down and then stopping • Moving forward, stopping moving forward less quickly, and then moving backwards • Speeding up, moving at a constant speed, speeding up and then slowing down

  11. If an object speeds up, this is shown on a distance-time graph as: • a decrease in the slope of the line • an increase in the slope of the line • an increase along the X- axis • an increase along the Y-axis

  12. On distance – time graphs, a period of time when an object is not moving is shown as: • A horizontal line • A vertical line • the line goes back to the X-axis • The line goes back to the Y-axis

  13. If an object starts to move back to where it came from, this is shown as: • a horizontal line • a vertical line • a slope upwards • a slope downwards

  14. Bell Ringer • This graph shows how an object moves for 5 seconds. Which of the following statements is correct? • The object is moving for the entire 5 seconds • The object moves a total distance of 10 meters • The object is stationary for 4 seconds • The title of this graph is velocity vs. time.

  15. Answers for HW • 10. 14,760m • 11. 30 hours • 12. 1.16 hours • 13. 550 miles • 14. 6.27 meters W/sec • 15. 12.2 m/s • 16. 60 Km • 17. 266.67 s • 4.35 hours

  16. Buggy Lab Practical • Come up with a procedure. Be specific! • Need to get it initialed before you begin • Multiple trials for each data point (at least five) • (Take an average for each time) • Be sure to use the correct formula for slope • Will graph averages at each data point and use line of best fit to make a prediction. • Part of your grade will be how good your prediction is!

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