A horse, running at a velocity of 18m/s takes 5 seconds to slow down to a velocity of 4m/s. Calculate the acceleration of the horse.

## Step 1: Identify the given values from the problem. The initial velocity (vi) = 18 m/s, the final velocity (vf) = 4 m/s, and the time taken (t) = 5 seconds.## Step 2:Understand that acceleration is defined as the rate of change of velocity per unit of time. It can be calculated from the equation .## Step 3:Substitute the given values into the acceleration equation. ### Note that the negative sign indicates that the horse is decelerating, i.e., slowing down.