Question

a car is traveling at a constant speed of 20m/sec. which graph below best represents the motion of the car?

Explanation:

Step1: Recall speed - distance - time relationship

Speed $v=\frac{d}{t}$, when $v$ is constant, $d = vt$. This is a linear relationship.

Step2: Analyze each graph

Graph W shows a non - linear increase in distance over time (acceleration). Graph X shows a linear increase in distance over time which is consistent with constant speed. Graph Y shows a decrease in the rate of increase of distance over time (deceleration). Graph Z shows distance not changing over time (stationary).

Answer:

B. X