# 透過應用程式繪畫物體的距離—時間關係線圖（學生工作紙）Using an app to plot distance-time graphs of motions on Sports Day (Student's Worksheets)

STEM連繫 11.1STEM connection 11.1透過應用程式繪畫物體的距離時間關係線圖Using an app to plot distance-time graphs of motions on Sports Day

• 距離─時間關係線圖
• 勻速運動與非勻速運動
• Distance-time graph
• Uniform motion and non-uniform motion • 透過應用程式繪畫距離—時間關係線圖
• Use an app to plot distance-time graphs • 設計捕捉不同運動項目的方法
• Design how to capture the motions of different sports • 繪畫和分析線圖
• Draw and interpret graphs Capture different motions on Sports Day and plot distancetime graphs of the motions!

1. 一條斜線代表物體以固定的速率移動。
2. 一條水平線代表物體靜止不動。
3. 斜率較低的斜線代表物體以較低的固定速率移動。
1. A straight line with a slope means theobject is moving with a steady speed.
2. A horizontal line means the object is at rest.
3. A straight line with a smaller slope means that the object is moving with a lower steady speed.

The slope of the curve keeps changing, which means the speed of the object also keeps changing. In fact, the slope of the curve is increasing with time. It means that the object is moving with an increasing speed. We can also read the graph like this: the object travels a smaller distance in the first t seconds than in the next t seconds, so the speed of the object is increasing.

The curve on the left also represents a nonuniform motion. The slope of the curve is decreasing with time, which means the object is moving with a decreasing speed.

100米選手的距離—時間關係線圖Distance-time graph of a 100 m runner

1.

2.

3.

Reference: