Question

A car is moving at a velocity of 75 m/s and comes to a complete stop

over 15 seconds. What is the cars acceleration?

Answer 1

The car has an acceleration of -5m/s² or a deceleration of 5m/s²

Step-by-step explanation:

Given parameters:

Initial velocity = 75m/s

Final velocity = 0m/s

Time taken = 15s

Unknown:

Acceleration of the car = ?

Solution:

Acceleration is the rate of change of velocity with time.

Mathematically;

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

Insert parameters and solve;

Acceleration =
`(0 - 75)/(15)` = -5m/s²

The car has an acceleration of -5m/s² or a deceleration of 5m/s²