Nature Of Science And Physics 2

Question

A car is traveling at a speed of 86 feet per second.
(a) What is its speed in km/h?

km/h
(b) Is it exceeding the 50 mile per hour speed limit?

Answer 1

86 feet per second is (86 x 0.304861) meters per second

or 26.218046 m/s.

26.218046 meters/second x 3600 seconds per hour gives 94384.9656 m/hr

or 94.3849656 kilometers per hour.

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86 feet per second is (86 ft/sec x 3600 sec/hr) or 309600 feet per hour.

309600 ft/hr divided by 5280 ft/1mile gives 58.63636364 miles per hour

which does exceed the 50 mph speed limit.