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Calculations
Below is a link to the exam board maths guide:
1 Calculating Area
Area of a square and a circle
2 Calculating Volume
Volume of a cube
3 Mechanical advantage
Mechanical advantage
- To read more about how to calculate mechanical advantage in pulleys, to this link on www.bournetoinvent.com
4 Pulley, belt drive and gear ratio
Pulley ratios
- Below are videos of how to calculate gear ratios and speed calculation for a pair of gears and a compound gear set.
- The formula above applies to all drive systems. For pulleys, you would use the diameter instead of number of teeth.
- Chain and sprocket calculations will be the same as gear calculations.
- One thing to note, in gear drive systems, the gears will spin in opposite directions as they move through the gears.
5 Graphs
Mean, Mode and Median
6 Percentages
Percentage increase or decrease
7 Ohm's law
Series resistor calculations
Parallel resistor calculations
Series resistor voltage calculations
Parallel resistor voltage calculations