3. DISTANCE-TIME GRAPHS z A straight line shows an object moving at a constant speed! z The steeper the line, the faster the object is moving! Work out the speed for each object shown in the graph! Click to find out the answers! 1. Yellow line 30/10 = 3 m/s 2. Blue Line 20/10 = 2 m/s 3. Pink line 10/10 = 1 m/s

4. STATIONARY OBJECTS! z A flat, horizontal line shows a stationary object!

5. ACCELERATING OBJECTS z Curved lines show if an object is accelerating or decelerating! z The steeper the line gets the faster the object is moving!

6. GRAPH QUESTIONS! z 1. What is the speed of the man during the first three seconds? z 2. What is the man doing between 3 and 5 seconds? z 3. Calculate the speed of the man between 5 and 7 seconds. z 4. What is the total distance that he has moved? z 5. Calculate the average speed for the whole journey. 1. 12/3 = 4 m/s 2. Stationary 3. 12/2 = 6 m/s 4. 24 m 5. 3.4 m/s Click for answers!

7. zDraw a distance-time graph showing your journey to school! zTry to include different gradients to show different speeds. Remember – steep slope is fast, gentle slope slow!! zTry to include rough distances and times at key points on your graph. Sketch a distance -time graph for a parachute jump! Think carefully!!!!

8. Describe the motion of the jogger in each section of the graph!