Question

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

Answer 1

The answer to this question is
`4 ms^(-2)`

Step-by-step explanation

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

`a = (V_f -V_i) /t`

where

`V_f` is the final velocity

`V_i` is the initial velocity

t is the time

a is the accelartion

as we konw

a = ?

t = 1.25 s

From rest So,

`V_i` = 0

`V_f = 5 ms^(-1)`

Putting values

`a = (5 - 0)/1.25`

`a = 5/1.25`

`a = 4`

`a = 4 ms^(-2)`

So, the right answe is
`4 ms^(-2)`