The car would have to decelerate at a rate of 51.3 feet per second-squared.
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to solve this problem you just simply need to convert second for minurtes75ft/s* 60s/min =4500ft/min ;)remember in 1 min we have 60 sec
Take 200 divide by 20!
45 mph (5280 feet/1 mile)(1 hour/3600 seconds) = 66 feet per second
30 mph = 30*5280 feet per hour = 30*5280/3600 feet per second = 44 feet per second (The conversion factor from mph to fps is 22/15)
If a racehorse and car are going 50mph they would both be going the same speed.