Final answer:
To convert the speed limit from 100 km/h to mph, divide by 1.609. This calculation gives us a speed limit of approximately 62.15 mph. Ideal speed is a concept referring to the maximum safe speed on a curve without the aid of tire-road friction.
Step-by-step explanation:
To find out the maximum speed limit for Tennessee interstate highways if the limit is roughly 100 km/h, we need to convert kilometers per hour to miles per hour (mph) given that 1 mile is approximately 1.609 kilometers. By dividing 100 km/h by 1.609, we can calculate the speed in mph.
Using this conversion, we find:
100 km/h ÷ 1.609 km/mile = 62.15 mph
So, if the speed limit on some Tennessee interstate highways is roughly 100 km/h, it would be approximately 62.15 mph.
Furthermore, when considering ideal speed, it is the maximum safe speed at which a vehicle can navigate a curve without relying on the friction between the tire and the road, which is typically less than speed limits on highways.