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

0.027m/s²

Step-by-step 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=(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=(3.5m/s-31m/s)/(15s)`

`a=(0.4m/s)/(15s)`

a= 0.027m/s²

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