Question

which graphs show an object changing speed? select all that apply

Explanation:

Step1: Recall speed - distance - time relationship

Speed is the rate of change of distance with respect to time. On a distance - time graph, the slope of the graph represents speed.

Step2: Analyze first graph

The first graph is a straight - line with a constant slope. This means the speed is constant.

Step3: Analyze second graph

The second graph is a curve. The slope of the curve is changing as time progresses. A changing slope means the speed is changing.

Step4: Analyze third graph

The third graph is a straight - line with a constant negative slope. This represents a constant speed in the opposite direction.

Step5: Analyze fourth graph

The fourth graph is a curve. The slope of the curve is changing as time progresses. A changing slope means the speed is changing.

Answer:

The second and fourth graphs show an object changing speed.