Question

a runner increases her speed from 3.1 m/s to 3.5 m/s during the last 15 seconds of her run, what was her acceleration during her big push to the finish ?

Answer 1

Acceleration = velocity/time
A= 3.5m/s/15s
A= 0.23m/s^2

Answer 2

Answer:

0.027m/s²

Explanation:

Acceleration (in its simpler form) is defined as the change in velocity divided by the interval of time in which occurred that change. Mathematically:

$a=\frac{v_{2}-v_{1} }{t}$

Where:

$v_{1}$: initial velocity

$v_{2}$: final velocity

t: time needed to that increase in velocity

Plugging the given values in the equation:

$a=\frac{3.5m/s-31m/s}{15s}$

$a=\frac{0.4m/s}{15s}$

a= 0.027m/s²

So, her acceleration during her big push was 0.027m/s²