which graphs show an object changing speed? select all that apply
which graphs show an object changing speed? select all that apply
Answer
Explanation:
Step1: Recall speed - distance - time relation
Speed is the rate of change of distance with respect to time. On a distance - time graph, the slope of the graph represents the speed.
Step2: Analyze first graph
The first graph is a curve. A curve on a distance - time graph means the slope is changing. Since slope = speed, a changing slope implies a changing speed.
Step3: Analyze second graph
The second graph is a straight line. The slope of a straight line is constant. So, the speed is constant.
Step4: Analyze third graph
The third graph is a straight line. The slope of a straight line is constant. So, the speed is constant.
Step5: Analyze fourth graph
The fourth graph is a curve. A curve on a distance - time graph means the slope is changing. Since slope = speed, a changing slope implies a changing speed.
Answer:
The first and the fourth graphs.