Question

Tranh slowed his skateboard as he

Answer 1

Answer:

Explanation:

Given parameters:

Initial velocity  = 8m/s

Final velocity  = 2m/s

Time taken  = 3seconds

Unknown and solution:

1. Is he accelerating or decelerating?

Tranh is obviously decelerating in this period. This is negative form of acceleration in which the speed reduces as the body comes to a stop.

Deceleration is a negative change in velocity with time i.e a body is reducing its velocity as time is changing.

2. What is the value?

 Mathematically;

          Deceleration  = $\frac{Final velocity - initial velocity}{time taken}$

         Deceleration  = $\frac{2 -8}{3}$

                                  = -2m/s²