A car decreases its speed from 19 m/s to 14 m/s in 5 seconds. Find the acceleration of the car. Also, name the device used to measure the distance travelled by the vehicle.

Given-

Initial speed of the car, u = 19 m/s

Final speed of the car, v = 14 m/s

Time taken to decrease the speed, t = 5 s

To find = acceleration (a)

We know that acceleration, a can be given as-

$a=\frac{v-u}{t}$

Substituting the given value in acceleration formula we get-

$a=\frac{14-19}{5}$$\Rightarrow \frac{-5}{5}\Rightarrow -1m/{s}^{2}$

$a=-1m/{s}^{2}$

Hence, the acceleration of the car is -1 m/s². The negative sign $(-)$ indicates that the acceleration is in the opposite direction, and the car is slowing down.

An odometer or odograph is an instrument or device used for measuring the distance travelled by a vehicle. 

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Updated on: 10-Oct-2022

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