Question

A car's velocity changes from 40 m/s to 30 m/s in 40 seconds. What is the

acceleration of the car?

Answer 1

- 0.25m/s²

Step-by-step explanation:

Given parameters:

Initial velocity = 40m/s

Final velocity = 30m/s

Time taken = 40s

Unknown:

Acceleration of the car = ?

Solution:

Acceleration is the rate of change of velocity with time.

So;

Acceleration =
`(Final velocity - Initial velocity )/(time )`

Acceleration =
`(30 - 40)/(40)` = - 0.25m/s²

This implies that the car will decelerate at a rate of 0.25m/s²