Question

A runner starts from a rest and speeds up with a constant acceleration . if she has gone a distance of 30 m at the point when she reaches a speed of 8 m/s what is her acceleration

Answer 1

1.1 m/s

Step-by-step explanation:

Apex

Answer 2

`a = 1.07 m/s^2`

Step-by-step explanation:

As we know that the runner starts from rest position

So here we can say

`v_i = 0`

now the distance moved by the runner is given as

`d = 30 m`

also we know that final speed of the runner will be

`v_f = 8 m/s`

now we know that

`v_f^2 - v_i^2 = 2 a d`

`8^2 - 0 = 2(a)(30)`

`a = (64)/(60)`

`a = 1.07 m/s^2`