Question

The speed of a car is 16 meters per second. What is this speed in miles per hour? What is

Answer 1

Conversion Factors:

1.61 km = 1 mile

60 sec = 1 min

60 min = 1 hour

Use dimensional analysis to solve.

$=\frac{16\ meters}{1\ second}$ × $\frac{1\ km}{1000\ meters}$ × $\frac{1 mile}{1.61\ km}$ × $\frac{60\ seconds}{1\ min}$ × $\frac{60\ min}{1\ hour}$

$=35.77639752$

= 36 miles/hour

If done properly, you should be left with the units miles/hour