Answer to Question #97873 in Mechanics | Relativity for Benedicta Fosu

Question

4. A runner maintains a constant speed of 6.0 m/s with a stride length of 1.4 m. If the runner
increases his stride length to 1.5 m without changing his stride frequency, what will his new speed
be?

Answer 1

Frequency (number of steps per second): $f= {v} / {l}=6.0 / 1.4 = 4.286 sec^{-1}$

If the step length increases : $v= f * l = 4.286 * 1.5 = 6.43 meter/sec$