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Average/Instantaneous Velocity/Speed

Average/Instantaneous Velocity/Speed. Physics 513. Let’s Try This One Together. A car travels in the +

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Average/Instantaneous Velocity/Speed

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  1. Average/Instantaneous Velocity/Speed Physics 513

  2. Let’s Try This One Together • A car travels in the +􏰄x-direction on a straight and level road. For the first 4.00 s of its motion, the average velocity of the car is = 6.25 m/s. What is the car’s displacement after 4.00 s?

  3. Let’s Try This One Together Too • Starting from the front door of your ranch house, you walk 60.0 m due east to your windmill, and then you turn around and slowly walk 40.0 m west to a bench where you sit and watch the sunrise. It takes you 28.0 s to walk from your house to the windmill and then 36.0 s to walk from the windmill to the bench. For the entire trip from your front door to the bench, what is your average speed?

  4. Let’s Think This Through Together… • Does the speedometer of a car measure speed or velocity? Explain

  5. Let’s Discuss the Direction of Motion Positive Negative Positive Negative

  6. Let’s Think About This One • The figure on the next slide is a position vs. time graph of the motion of a particle. • (a) Rank the values of the particle’s x-velocity at the points P, Q, R, and S from most positive to most negative. • (b) At which points is positive? • (c) At which points is negative? • (d) At which points is zero? • (e) Rank the values of the particle’s speed at the points P, Q, R, and S from fastest to slowest

  7. Figure

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