Question

What is the acceleration of a bike that's goes from 38km/hr to a stop in 4.5 s?

Answer 1

a = 38 / 4.5

a = 8.5

Answer 2

The acceleration of a bike is 2.34 m/s².

Step-by-step explanation:

Given that,

Velocity = 38 km/hr

Time = 4.5 s

We need to calculate the acceleration

Using equation of motion

`v = u+at`

`a=(v-u)/(t)`

Where, v = final velocity

u = initial velocity

t = time

Put the value in to the formula

`a=(0-38*(5)/(18))/(4.5)`

`a=-2.34\ m/s^2`

Negative sign shows the deceleration.

Hence, The acceleration of a bike is 2.34 m/s².