Question

identify the graph that displays the speed of a car accelerating onto a highway until it reaches the speed limit, and then continue on the highway at the speed limit.

Explanation:

Step1: Analyze car's motion

The car first accelerates (speed increases with time) until it reaches the speed - limit. Then it moves at a constant speed (horizontal line on speed - time graph as speed is not changing with time).

Step2: Evaluate each option

Option a has irregular jumps in speed which is not correct for this scenario. Option b has a non - realistic up - and - down pattern for speed. Option c has a continuously increasing speed without reaching a constant value. Option d shows a linear increase in speed (acceleration) followed by a horizontal line (constant speed at the speed limit).

Answer:

d.