distance-time graphs z a straight line shows an object moving at a constant speed! z the steeper the...

DISTANCE-TIME GRAPHS

A straight line shows an object moving at a constant speed! The steeper the line, the faster the object is moving!

CONSTANT SPEED!!!!!!

0

10

20

30

40

0 1 2 3 4 5 6 7 8 9 10 11

Time (s)

Medium slower faster

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

STATIONARY OBJECTS!

A flat, horizontal line shows a stationary object!

STATIONARY OBJECT!!!!

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2

4

6

8

10

12

0 1 2 3 4 5 6 7 8 9

Time (s)

ACCELERATING OBJECTS

ACCELERATION!!!

0

5

10

15

20

0 1 2 3 4 5 6

Time (s)

Dis

tan

ce (

m)

Curved lines show if an object is accelerating or decelerating!

The steeper the line gets the faster the object is moving!

GRAPH QUESTIONS!

0

2

4

6

8

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12

14

0 1 2 3 4 5 6 7

Dis

tan

ce

(m)

Time (s)

MAN WALKING A CAT 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.

• 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!

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!!!!

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