Question

A person runs at 35 m/s from a standstill. What is their acceleration after 5 sec?

Answer 1

The acceleration is 7m/s^2

Explanation:

Given

`u = 0m/s` -- Initial Velocity

It is 0 because the person starts from a standstill

`v = 35m/s` -- final velocity

`t = 5s` -- time

Required

Determine the acceleration

This is calculated using Newton's first equation of motion

`v = u + at`

Substitute values for v, u and t

`35 = 0 + a*5`

`35 = 0 + 5a`

`35 = 5a`

Divide both sides by 5

`(35)/(5) = a`

`7 = a`

`a = 7`

Hence, the acceleration is 7m/s^2