Average Speed on a Race Track Circuit
Date: 6/30/96 at 14:8:23 From: vico Minnocci Subject: Race Track Speed My Dad and I were trying to figure out how race track organizers figure out on average speed on a circuit. Given the distance (4.260 km) and time (1.15.989 min/sec) we couldn't use the d/t=average speed formula. The answer we got is not even close to the actual speed that the organizers posted... can you please help us? Thanks Vico
Date: 7/5/96 at 22:25:39 From: Doctor Robert Subject: Re: Race Track Speed You should be able to use the d/t formula, but you must be sure to use the correct units so that your answer agrees with the organizer's calculations. To find the average speed from the data given we have v = 4.260/(1+15.989/60) which is equal to approx 3.3636 km/min. To get km/hr, we multipy this by 60 since there are 60 minutes in an hour. The calculation gives 201.8 km/hr. This is roughly 126 mi/hr. This is an AVERAGE speed. The race drivers may drive a certain lap quite a bit faster or quite a bit slower than the average. By the way, 1 minute and 15.989 seconds is 1+15.989/60 minutes. I hope that this helps. -Doctor Robert, The Math Forum Check out our web site! http://mathforum.org/dr.math/
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