# HW01Sol - Jim Guinns PHYS2211 Assignment #1 Solutions 1....

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Jim Guinn’s PHYS2211 Assignment #1 Solutions 1. Alex decides to go out for a walk. At time t 1 = 3.00s he is at position x 1 = 10.0m , at time t 2 = 10.0s he is at x 2 = 25.0m , and at time t 3 = 20.0s he is at x 3 = 17.0m . (Remember that vectors require a unit vector to describe the direction.) a) What is Alex’s displacement vector from time t 1 to t 2 ? The displacement is defined as x = x 2 x 1 = 25.0m i – 10.0m i = 15.0m i . b) What is Alex’s displacement vector from time t 2 to t 3 ? x = x 3 x 2 = 17.0m i – 25.0m i = -8.0m i . c) What is Alex’s displacement vector from time t 1 to t 3 ? x = x 3 x 1 = 17.0m i – 10.0m i = 7.0m i . 2. Consider the values given for Alex’s walk in Problem 1. a) What is Alex’s average velocity vector from time t 1 to t 2 ? The average velocity is defined as v av = x / t = 15.0m i / (10.0s – 3.00s) = 2.14m/s i . b) What is Alex’s average velocity vector from time t 2 to t 3 ? v av = x / t = -8.0m i / (20.0s – 10.0s) =

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## This note was uploaded on 09/25/2011 for the course PHYSICS 22 taught by Professor Lomant during the Spring '11 term at Georgia Perimeter.

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HW01Sol - Jim Guinns PHYS2211 Assignment #1 Solutions 1....

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