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Differential equations.

rebelmaths

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Collisions question involving principle of conservation of momentum.

Face, Place and actual value, adding, subtracting, multiplying, dividing and rounding decimals.

There are copious comments in the definition of the function eqnline about the voodoo needed to have a JSXGraph diagram interact with the input box for a part.

To be used on the Mechanics wiki page under Dynamics - maximum frictional force page

This question tests a student's ability to subtract one fraction from another with the same denominator. There is at least one negative numerator.

To be used on the Inclined plane page of the Dynamics section of the Mechanics wiki page.

This question uses the vis.js library to plot 3D functions and data sets.

As well as JME functions to make plots, you can use javascript functions to get more control over how the plots are rendered.

Because JavaScript numbers lose precision as they get bigger, you get some unexpected results.

See the variable "two" - the difference should be 2, but because the JavaScript representation of each of the two numbers is the same, it thinks the difference is 0.

Using the decimal data type, there's no loss of precision, so the correct value is produced.