Question

George was riding his bike downhill on a street in a Canadian town. The street- side speed sensor clocked him at 30 km per hour. His bike speedometer was set up in U.S. units of mph. What would the readout have been?b. A short-course meter pool is 25 meters long.

Answer 1

In order to find the readout in his bike speedometer, we need to know the approximate value for the conversion between miles and kilometers, then,

`1\text{ }mi\Rightarrow1.609\text{ }km`

then, use conversion factors with the street side sensor,

`(30km)/(h)\ast(1mi)/(1.609km)\approx(18.64mi)/(h)`

Answer:

The approximate value shown in his bike speedometer is 18.64 mph