Distance time graphs
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Distance time graphs Presentation Transcript

  • 1. DISTANCE-TIME GRAPHS C O N S T A N T S PEED !!!!!! Work out the speed for each object shown in the graph! Medium slower Click to find out the answers! f ast er 1. Yellow line 40 30 30/10 = 3 m/s 20 2. Blue Line 10 20/10 = 2 m/s 0 3. Pink line 0 1 2 3 4 5 6 7 8 9 10 11 10/10 = 1 m/s Time ( s) A straight line shows an object moving at a constant speed! The steeper the line, the faster the object is moving!
  • 2. STATIONARY OBJECTS! STATIONARY OBJECT!!!! 12 10 8 6 4 2 0 0 1 2 3 4 5 6 7 8 9 Time ( s ) A flat, horizontal line shows a stationary object!
  • 3. ACCELERATING OBJECTS ACCELERATION!!! Distance (m ) 20 15 10 5 0 0 1 2 3 4 Tim e (s) 5 6 Curved lines show if an object is accelerating or decelerating! The steeper the line gets the faster the object is moving!
  • 4. GRAPH QUESTIONS! MAN WALKING A CAT 14 12 10 8 ) m ( e c n a t s i D 6 4 2 0 0 1 2 3 4 Time (s) 5 6 7 1. What is the speed of the man during the first three seconds? 2. What is the man doing between 3 and 5 seconds? 3. Calculate the speed of the man between 5 and 7 seconds. 4. What is the total distance that he has moved? 5. Calculate the average speed for the whole journey. Check here for answers! • 1. 12/3 = 4 m/s •2. Stationary •3. 12/2 = 6 m/s •4. 24 m •5. 3.4 m/s
  • 5. Draw a distance-time graph showing your journey to school! Try to include different gradients to show different speeds. Remember – steep slope is fast, gentle slope slow!! Try to include rough distances and times at key points on your graph. Sketch a distance -time graph for a parachute jump! Think carefully!!!!
  • 6. Describe the motion of the jogger in each section of the graph!