Arunner starter race and in 1.25 seconds has a velocity of 5.0 m/s east determine the acceleration of the runner

Answer

The answer to this question is

Explanation

As we know that accelartion is the rate of change of velocity. So, it can be write as

where

is the final velocity

is the initial velocity

t is the time

a is the accelartion

as we konw

a = ?

t = 1.25 s

From rest So,

= 0

Putting values

So, the right answe is

490 n

f=125n a=2.5m/s2