Question

A horse is riding 9m/s. In two seconds it slows down to 1m/s, what is the acceleration of the horse.

Answer 1

Answer:

-4m/s²

Explanation:

Given parameters:

Initial velocity  = 9m/s

Final velocity  = 1m/s

Time taken  = 2s

Unknown:

Acceleration  = ?

Solution:

The acceleration of a body is the change in velocity of a body with time.

    Acceleration  = $\frac{Final velocity - Initial velocity }{time}$

Insert the parameters and solve;

    Acceleration  = $\frac{1 - 9}{2}$  = -4m/s²

We can say, the car is decelerating at a rate of 4m/s²