The Nature Of Science And Physics

Question

The speed limit on certain interstate highways is 55 miles per hour.
(a) What is this in feet per second?

ft/s
(b) How many km/h is this?

km/h

Answer 1

55 miles in 1 hour times 1 hour in 3600 seconds times 5280 feet in 1 mile crushes

down into (55×1×5280) feet divided by (1×3600×1) seconds or

80.666666666 feet per second.

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80.666666666 feet per second times 3600 seconds per hour gives 290400 feet per hour.

290400 feet times 0.304861 meter per foot goes to 88531.6344 meters.

Then 88531.6344 meters divided by 1000 meters per kilometer equals

88.5316344 kilometers in 1 hour or 88.5316344 kilometers per hour.