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Session_15_Powerpoint

Session_15_Powerpoint - pass over a grid of equally spaced...

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PHYS 1100 – SI Session 15 Leader – Mel Triay

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Group Activity A Many of the solutions to problems in this class are hinted by certain ‘buzz’ words or phrases. In a group (3 or more), come up with a list of these ‘buzz’ words and phrases.
Group Activity B Which types of problems are giving you the most trouble in this class so far?

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Kinematics Vectors vs. scalars Displacement vs. distance travelled Velocity vs. speed Average vs. Instantaneous
Average quantities - Vector

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Example 1

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Practice Set 1
Practice Set 1 b. When the legal speed limit for the New York Thruway was increased from 55 mi/h to 65 mi/h, how much time was saved by a motorist who drove the 700 km between the Buffalo entrance and the New York City exit at the legal speed limit?

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Conceptual The figure below shows four paths along which objects move from a starting point to a final point, all in the same time interval. The paths

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Unformatted text preview: pass over a grid of equally spaced straight lines. Rank the paths according to (a) the average velocity of the objects and (b) the average speed of the objects, greatest first. Instantaneous Kinematics • Calculus – Did you really think you’d never have to use it? Position Velocity Acceleration Position Velocity Acceleration Key Phrases and Concepts • Speeding up / Slowing down • Max. / min. velocity and displacement • ‘Turnaround’ points Example 2 A particle's position is given by x = 4 - 12 t + 3 t 2 (where t is in seconds and x is in meters). a. What is its velocity at t = 1 s? b. Is it moving in the positive or negative direction of x just then? c. What is its speed just then? d. Is it speeding up or slowing down just Answer to Example 2 Practice Set 2 Answers to Practice Set 2...
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