Homework2 Problem 2.26 « previous 6 of 11 ne Due: 09/29/17 Score 17.9%| Problem

Question

Homework2 Problem 2.26 « previous 6 of 11 ne Due: 09/29/17 Score 17.9%| Problem 2.26 Part A A world -class sprinter can reach a top speed (of about 11.6 m/s) in the first 20.0 m of a race What is the average acceleration of this sprinter? Express your answer with the appropriate units. tems 1. Problem 2.04 2 Problem 2 a Value Units 3 Problem 2 12 4 Problem 222 5 Chapter2 Submit My Answers Give Up Part B How long does it take her to reach that speed? Express your answer with the appropriate uni 6. Probiem 7 Problem 2 Probiem g chapter 2 10 Problem 2 4 tValueUnits Submit My Answers Give Up Continue Type here to search

Explanation / Answer

A. using Newton's equation of motion

v2 = u2 + 2as ==> (11.6 m/s)2 = 0+ 2 x a x 20m

=> a = 3.36 m/s2

B. Using v = u + at we have t = v/a = 20/3.36 = 5.95 sec

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