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

Answer:

$a = 1.07 m/s^2$

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

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

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

$a = \frac{64}{60}$

$a = 1.07 m/s^2$

Answer 2

Answer:

1.1 m/s

Explanation:

Apex