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PHYS 1300 Lecture 2: PHYSICS 1300 Lecture 2

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ivoryrat508
12 Dec 2017
School
University of Guelph
Department
Physics
Course
PHYS 1300
Professor
Jason Thomas

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Document Summary

Distance - scalar (eg. 1 mile drag race) Displacement - vector (eg. 0 when ball falls back down to starting point) Average speed (defined as the rate of change in distance) - scalar. Average velocity (defined as the rate of change in displacement) - vector. Note: magnitude of an object"s displacement is always lesser than or equal to the distance travelled. Example if you start at the uc, walk 20m to the library, then 40m to the parking lot, then 60 m back to the uc, the following is true: Distance travelled is 120m (20m + 40m + 60m)

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Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

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Related Questions

To demonstrate the tremendous acceleration of a top fuel dragracer, you attempt to run your car into the back of a dragster thatis "burning out" at the red light before the start of a race.(Burning out means spinning the tires at high speed to heat thetread and make the rubber sticky.)

You drive at a constant speed of toward the stopped dragster, notslowing down in the face of the imminent collision. The dragsterdriver sees you coming but waits until the last instant to put downthe hammer, accelerating from the starting line at constantacceleration, . Let the time at which the dragster starts toaccelerate be .

a- What is , the longest time after the dragster begins toaccelerate that you can possibly run into the back of the dragsterif you continue at your initial velocity?

b- Assuming that the dragster has started at the last instantpossible (so your front bumper almost hits the rear of the dragsterat ), find your distance from the dragster when he started. If youcalculate positions on the way to this solution, choose coordinatesso that the position of the drag car is 0 at . Remember that youare solving for a distance (which is a magnitude, and can never benegative), not a position (which can be negative).

c- Find numerical values for and in seconds and meters for the(reasonable) values (26.8 m/s) and .
Separate your two numerical answers by commas, and give your answerto two significant figures.