Question

A car is travelling at a speed of 65 miles per hour. Calculate its speed in: a. kilometers per hour b. meters per second c. feet per second

Answer 1

a. 104.6 kilometers per hour

b. 29.1 meters per second

c. 95.3 feet per second

Explanation:

We can calculate the equivalence in each case using the conversion factors, as follows:

`\begin{gathered} \text{a. kilometers per hour} \\ \\ 65\frac{\text{ miles}}{\text{ hour}}\cdot\frac{1.609\text{ km}}{1\text{ miles}}=104.6\text{ kilometers per hour} \\ \\ \text{b. meters per second } \\ \\ 65\frac{\text{ miles}}{\text{ hour}}\cdot\frac{1609.34\text{ m}}{\text{ 1 miles}}\cdot\frac{1\text{ hour}}{3600\text{ seconds}}=29.1\text{ meters per second } \\ \\ \text{ c. feet per second} \\ \\ 65\frac{\text{ miles}}{\text{ hour}}\cdot\frac{5280\text{ m}}{\text{1m}\imaginaryI\text{les}}\cdot\frac{1\text{ hour}}{3600\text{ seconds}}=95.3\text{ feet per second} \end{gathered}`