Question

which time interval shows the object decelerating? 10 - 15s 20 - 25s 0 - 5s 5 - 10s

Explanation:

Step1: Recall deceleration concept

Deceleration means decrease in velocity. On a velocity - time graph, it is shown by a negative slope.

Step2: Analyze each interval

0 - 5s: Positive slope (acceleration).
5 - 10s: Zero slope (constant velocity).
10 - 15s: Negative slope (deceleration).
20 - 25s: Negative slope but we are looking for the first decelerating interval.

Answer:

10 - 15s