Homework 3

# Homework 3 - sanchez(ds28677 homework 03 Turner(58220 This...

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sanchez (ds28677) – homework 03 – Turner – (58220) 1 This print-out should have 12 questions. Multiple-choice questions may continue on the next column or page – fnd all choices beFore answering. 001 10.0 points The graph shows the velocity v as a Function oF time t For an object moving in a straight line. t v 0 t Q t R t S t P Which graph shows the corresponding dis- placement x as a Function oF time t For the same time interval? 1. None oF these graphs is correct. 2. t x 0 t Q t R t S t P 3. t x 0 t Q t R t S t P 4. t x 0 t Q t R t S t P 5. t x 0 t Q t R t S t P correct 6. t x 0 t Q t R t S t P 7. t x 0 t Q t R t S t P 8. t x 0 t Q t R t S t P 9. t x 0 t Q t R t S t P Explanation: The displacement is the integral oF the ve- locity with respect to time: Vx = i Vv dt . Because the velocity increases linearly From zero at frst, then remains constant, then de- creases linearly to zero, the displacement will increase at frst proportional to time squared, then increase linearly, and then increase pro- portional to negative time squared. ±rom these Facts, we can obtain the correct answer. t x 0 t Q t R t S t P 002 (part 1 oF 5) 10.0 points Consider a toy car which can move to the right (positive direction) or leFt on a horizon- tal surFace along a straight line. car v O +

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sanchez (ds28677) – homework 03 – Turner – (58220) 2 What is the acceleration-time graph if the car moves toward the right (away from the origin), speeding up at a steady rate? 1.
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Homework 3 - sanchez(ds28677 homework 03 Turner(58220 This...

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