U14 - compound measures using graphs
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16 Terms
1tonne = ?kg
1000
5miles = ?km
8
speed =
distance/ time
pressure =
force/ area
rate of flow
quantity/ time
how to calculate the instantaneous rate of change of a curve
draw a tangent to the point you want to find the instantaneous rate of change of
calculate m of the tangent
there is a time (seconds)/ temperature (degrees Celcius) graph of water in a kettle
the gradient of the line is 2
what is an interpretation of the gradient
the temperature increases by 2C per second
how to approximate the area under a curve
divide the curve into the specified number to make trapeziums
calculate the area of each trapezium
add them up
what does a straight line mean on distance/ time
moving at a constant speed
what does a horizontal line mean on distance/ time
stopped
what does a diagonal, straight line going up mean on distance/ time
moving at a constant speed
what does a diagonal, straight line going down mean on distance/ time
returning back to original position at a constant speed
what does area under the line equal on a velocity/ time graph
distance travelled
what does a positive gradient mean on a velocity/ time graph
acceleration
what does a negative gradient mean on a velocity/ time graph
decelerating
what does a flat line equal on a velocity/ time graph
moving at a constant speed