Posted by Mike on Friday, February 22, 2008 at 4:03pm.
If you want it in miles/hr^2, divide 48 miles/hr by 0.3 hours. If you want it in ft/s^2, m/s^2 or g's, you will have to do some conversions
change in velocity = (50-12) = 38 miles/hr
change in time = .3 hours
acceleration = (38 miles / hour) / .3 hours
which is:
127 miles/hour^2
Now no one uses miles per hour squared. Hardly anyone uses feet per second squared any more either but since we are evidently not using metric units here, we can just go to feet/s^2
We need to know there are 5280 feet in a mile and that there are 3600 seconds in an hour.
So
127 miles/hr^2 * 5280 ft/mile * 1 hr^2/3600^2 s^2
= 0.0517 ft/s^2
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