Question

Let's take a look at something here. I thought the 15 mph for a base runner was kind of slow. I mean, it was a heck of lot faster than I could run, but still 15 mph, equates to about 6.7 m/s. We saw earlier that Usain Bolt average speed was 100 m/9.59 s which is 10.4 m/s. I just looked the NCAA men's 100 m dash record this year--10.82 s. Calculate that speed in in mph.

Answer 1

Answer:

The speed is 20.70 mph.

Explanation:

Given that,

Speed = 6.7 m/s = 15 mph

$1\ m/s = \dfrac{15}{6.7}$

$1 m/s =2.24\ mph$

In 10.4 m/s,

$10.4\ m/s=2.24\times10.4\ mph$

$10.4\ m/s=23.3\ mph$

If 100 m record in 10.82 sec

We need to calculate the speed

Using formula of speed

$v = \dfrac{d}{t}$

Put the value into the formula

$v=\dfrac{100}{10.82}$

$v=9.242\ m/s$

$v=9.242\times2.24\ mph$

$v=20.70\ mph$

Hence, The speed is 20.70 mph.