COLLEGE PHYSICS
COLLEGE PHYSICS
2nd Edition
ISBN: 9781464196393
Author: Freedman
Publisher: MAC HIGHER
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Chapter 2, Problem 5QAP
To determine

Which speed gives the largest straight-line displacement in a fixed time

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• At the instant the traffic light turns green, a car that has been waiting at an intersection starts ahead with a constant accel- eration of 2.80 m/s. At the same instant a truck, traveling with a constant speed of 20.0 m/s, overtakes and passes the car. (a) How far beyond its starting point does the car overtake the truck? (b) How fast is the car traveling when it overtakes the truck? (c) Sketch an x-t graph of the motion of both vehicles. Take x = at the intersection. (d) Sketch a v-t graph of the motion of both 2.34 vehicles.
Can an object have a negative acceleration and be speeding up? If so, describe a possible physical situation and a corresponding coordinate system. If not, explain why not.
A walker sees a rock fall from the top of a steep cliff and notices that it takes 1.5 seconds for the rock to fall the final third ( or 1/3) of the way. • a) What is the height of the cliff in metres? b) In part (a) you get two roots to a quadratic equation and use one of them for your answer. What does the second root represent?

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COLLEGE PHYSICS

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