Question

A car is traveling at 40 m/s. The brakes are applied an after 3 seconds the car is traveling 13 m/s. What is the acceleration of the car?

Answer 1

- 9m/s²

Step-by-step explanation:

Given parameters:

Initial velocity = 40m/s

Time taken = 3s

Final velocity = 13m/s

Unknown:

Acceleration of the car = ?

Solution:

Acceleration is the rate of change of velocity with time taken.

Acceleration =
`(Final velocity - Initial velocity )/(Time taken)`

Acceleration =
`(13 - 40 )/(3)` = - 9m/s²