You should not be travelling on a pavement at 70 mph!
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The total stopping distance for a car travelling at 30 mph on a dry surface is about 75 feet. However, you may wish to note that in most countries, driving a car on the pavement is illegal.
5o miles per hour is 73.3 feet per second. The average stopping distance for the breaks at that speed is 128 feet. Now add to that the average reaction time for a driver at that speed which is 3/4 second so we add 55 feet gives us a total of 183 feet.
Gerald and Michelle went on a 24 mile bike ride. They rode 1 fourths of the distance before stopping. By, luchtime, they rode 5 eights of the total distance. How many miles did they have left to ride after lunch.
105
Average speed.