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 acceleration of the car is -5m/s²

Step-by-step explanation:

Given parameters:

Initial velocity = 75m/s

Final velocity = 0m/s

Time = 15s

Unknown:

Acceleration of the car = ?

Solution:

Acceleration is the rate of change of velocity with time;

Mathematically;

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

Insert parameters and solve,

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

The acceleration of the car is -5m/s²