Posted by Phil on Thursday, September 16, 2010 at 1:25am.
A sprinter starts from rest in a 100meter race, accelerates to his full running speed of 10.3 m/s in 1.15 seconds (assume constant acceleration) and continues at that speed for the rest of the race.
(a) How far did he run before attaining his full speed?
(b) What was his final time for the race?

Physics  TutorCat, Thursday, September 16, 2010 at 1:31am
(a)
acceleration=(final velocityinitial velocity)/time
distance = (1/2)*(acceleration)*(time)^2 + (initial velocity)*(time)
(b) 100m  _____ (<answer from (a))
find time using this formula:
distance = (1/2)*(acceleration)*(time)^2 + (initial velocity)*(time)
finally, add that time with 1.15 seconds

Physics  TutorCat, Thursday, September 16, 2010 at 1:32am
note: for part (b) plug in the "new" distance

Physics  bilal, Monday, July 11, 2016 at 6:42pm
mega velocity with aa high concentration means inertia resultant force= 22y2+1.48
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