Chapter 1 - Introduction to Physics - Problems and Conceptual Exercises - Page 15: 19

(a) $23~m/s=75~ft/s$ (b) $23~m/s=51~mi/h$

(a) We can convert the given speed into feet per second as follows: $v=23m/s\times 3.281feet/m$ $v=75feet/s$ (b) We can convert the given speed into miles per hour as follows: $v=23m/s\frac{1mile}{1609m}\times 3600s/hr$ $v=51miles/h$