Question

What is the deceleration of a bicycle that goes from 40m/s to 20m/s in 5 seconds

Answer 1

`-4 m/s^2`

Step-by-step explanation:

The acceleration of the bycicle is given by:

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

where

v = 20 m/s is the final velocity of the bike

u = 40 m/s is the initial velocity

t = 5 s is the time interval

Substituting numbers, we find

`a=(20 m/s-40 m/s)/(5s)=-4 m/s^2`

and the acceleration is negative, which means that the bycicle is slowing down.