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Do Now!. Last lesson. Speed investigation. Today’s lesson. Interpreting distance-time and speed-time graphs. Distance against time graphs. distance. time. No movement?. distance. time. No movement. distance. time. Constant speed?. distance. time. Constant speed. distance. time.

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Presentation Transcript

Last lesson
Last lesson

Speed investigation


Today s lesson
Today’s lesson

  • Interpreting distance-time and speed-time graphs



No movement
No movement?

distance

time


No movement1
No movement

distance

time


Constant speed
Constant speed?

distance

time


Constant speed1
Constant speed

distance

time


Constant speed2
Constant speed

distance

The gradient of this graph gives the speed

time


Constant speed3
Constant speed

How would the graph look different for a faster constant speed?

distance

time


Constant speed4
Constant speed

fast

distance

time


Constant speed5
Constant speed

fast

How would the graph look different for a slower constant speed?

distance

time


Constant speed6
Constant speed

fast

distance

slow

time



Getting faster
Getting faster

distance

time


Examples
Examples

distance

time




Speed against time graphs
Speed against time graphs

speed

time


No movement2
No movement?

speed

time


No movement3
No movement

speed

time


Constant speed7
Constant speed?

speed

time


Constant speed8
Constant speed

speed

time


Constant speed9
Constant speed

How would the graph look different for a faster constant speed?

speed

time


Constant speed10
Constant speed

speed

fast

time


Constant speed11
Constant speed

How would the graph look different for a slower constant speed?

speed

fast

time


Constant speed12
Constant speed

speed

fast

slow

time



Getting faster accelerating2
Getting faster? (accelerating)

speed

Constant acceleration

time


Getting faster accelerating3
Getting faster? (accelerating)

speed

The area under the graph gives the distance travelled

time


Example
Example:

speed

time




A dog falling from a tall building no air resistance2
A dog falling from a tall building (no air resistance)

speed

Area = height of building

time


Be careful

distance

speed

time

time

Be careful!


No movement4

distance

speed

time

time

No movement


Constant speed13

distance

speed

time

time

Constant speed

Area = distance travelled


Constant acceleration

distance

speed

time

time

Constant acceleration

Area = distance travelled




Investigating rolling balls
Investigating rolling balls!

  • Prediction

  • Table of results (Mass, circumference or diameter, Distance, time (measured several times), speed)

  • Suitable graph

  • Conclusion

  • Evaluation


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