Class Management Help chapter 4-A test Begin Date: 531/2017 12:00.00 PM Due Date
ID: 1625813 • Letter: C
Question
Class Management Help chapter 4-A test Begin Date: 531/2017 12:00.00 PM Due Date: 6/3/2017 1159:00 PM End Date: 6/28/201? 12:59:00 AM (10%) Problem 10: When starting a foot race, a 705 kg sprinter exerts an average force of 655 N backward on the ground for 0.55 s. Randomized Variables m 705 kg A 50% Part (a) What is his final speed in m/s? Grade Su Potential Submissi tano 7 8 9 Attempts cotano sino acoso 4 5 6 detailed atano acotano sinho 1 2 3 cosh00 tanho cotanho ODegrees Radians vol I give up! Feedback: 5% deduction per feedback. Hints: 5% deduction per hint. Hints remaining: 4 A 50% Part (b) How far does he travel in meters? All content 2017 Expert TA.Explanation / Answer
F=Ma
F=655N
M=70.5kg
t=0.55s
a=F/M=655/70.5=9.3 m/s2
V=U+at=9.3*0.55=5.11m/s
S=1/2 *at^2
= 1/2 * 9.3*0.55^2
= 1.406m