SOLUTION: A car starts from rest, and reaches a speed of 50MPH in 6 seconds, what is the acceleration and average speed ?

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Question 647347: A car starts from rest, and reaches a speed of 50MPH in 6 seconds, what is the acceleration and average speed ?
Answer by Edwin McCravy(20063) About Me  (Show Source):
You can put this solution on YOUR website!
A car starts from rest, and reaches a speed of 50MPH in 6 seconds, what is the acceleration and average speed ?
To change miles per hour to feet per second multiply by 22%2F15
So 50 miles per hour = 50×22%2F15 = 73.3 feet per second.
acceleration = velocity%2Ftime = %2873.3%2A%22ft%2Fs%22%29%2F%286s%29 = 12.2 ft/s².
average speed = distance_traveled%2Ftime
Formula for distance: s=v%5B0%5Dt%2Bexpr%281%2F2%29at%5E2 = 0%2A6%2Bexpr%281%2F2%29%2812.2%296%5E2 = 0 + 6.1 = 6.1 feet
average speed = distance_traveled%2Ftime = 6.1ft%2F6s = 1.02 ft/s
Edwin