Question

speed problems which graphs show an object moving at a constant speed? select all that apply

Explanation:

Step1: Recall speed - distance - time relation

Speed $v=\frac{d}{t}$, where $d$ is distance and $t$ is time. For constant speed, the ratio of distance to time is constant, so the distance - time graph is a straight - line.

Step2: Analyze each graph

The first two graphs are non - linear (curved), which means the speed is changing. The third graph is a straight line with a negative slope, indicating motion in the opposite direction at a constant speed. The fourth graph is a straight line with a positive slope, indicating motion in the positive direction at a constant speed.

Answer:

The third and fourth graphs.