Question

a track runner starts from rest and speeds up to 7 m/s in 4 s. what is the track runners acceleration in m/s²? type the correct numerical answer to the nearest one - hundredth into the box. m/s²

Explanation:

Step1: Recall acceleration formula

The formula for acceleration is $a=\frac{v - u}{t}$, where $v$ is final - velocity, $u$ is initial - velocity, and $t$ is time.

Step2: Identify given values

The runner starts from rest, so $u = 0\ m/s$, $v=7\ m/s$, and $t = 4\ s$.

Step3: Substitute values into formula

$a=\frac{7 - 0}{4}=\frac{7}{4}=1.75\ m/s^{2}$

Answer:

$1.75$