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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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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


Constant speed

distance

The gradient of this graph gives the speed

time


Constant speed

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

distance

time


Constant speed

fast

distance

time


Constant speed

fast

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

distance

time


Constant speed

fast

distance

slow

time


Getting faster? (accelerating)

distance

time


Getting faster

distance

time


Examples

distance

time


A car accelerating from stop and then hitting a wall

distance

time


A car accelerating from stop and then hitting a wall

distance

time


Speed against time graphs

speed

time


No movement?

speed

time


No movement

speed

time


Constant speed?

speed

time


Constant speed

speed

time


Constant speed

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

speed

time


Constant speed

speed

fast

time


Constant speed

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

speed

fast

time


Constant speed

speed

fast

slow

time


Getting faster? (accelerating)

speed

time


Getting faster? (accelerating)

speed

Constant acceleration

time


Getting faster? (accelerating)

speed

The area under the graph gives the distance travelled

time


Example:

speed

time


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

speed

time


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

speed

time


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

speed

Area = height of building

time


distance

speed

time

time

Be careful!


distance

speed

time

time

No movement


distance

speed

time

time

Constant speed

Area = distance travelled


distance

speed

time

time

Constant acceleration

Area = distance travelled


Questions!


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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