SOLUTION: A sports car accelerates from a standing start to 65 mi/h in 4.61 s. Find the car's average acceleration in ft/s2 during the run. Round your answer to the nearest ft/s.

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Question 324530: A sports car accelerates from a standing start to 65 mi/h in 4.61 s. Find the car's average acceleration in ft/s2 during the run. Round your answer to the nearest ft/s.

Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
a_ave=%28vf-vi%29%2F%28tf-ti%29
First convert mph to ft/s.
1 mile/hr*(5280 ft/mile)*(1 hr/3600 sec)=1.47 ft/s
65 mph=95.3 ft/s
a_ave=%28vf-vi%29%2F%28tf-ti%29
a_ave=%2895.3-0%29%2F%284.61%29
a_ave=21 ft/s^2