Physics
posted by Phil on .
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?

(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 
note: for part (b) plug in the "new" distance

mega velocity with aa high concentration means inertia resultant force= 22y2+1.48