Determine the forces in the pistons of a hydraulicly operated excavator.

Homework set.  Frame and machine problems.

Homework set.  More frame and machine problems.

Homework set.  Frame and machine problems.

Determine the mechanical advantage of a pair of compound lopping shears.

Classic machine problem.  Find the mechanical advantage of a pair of pliers and the force on the hinge pin.

Determine the correct parametric representation of a given curve.  Curve is randomly chosen from a set of 20.

The graph of the curve was not displayed on my machine.

Simultaneous equations question. values for the coefficients are generated to be small numbers, random values are generated for the weights and the resultant energies are calculated for the question. Student needs to solve equations to find coefficients. Advice gives solution using method of elimination.

Students are shown a graph of the value of a machine over time. The line equation is randomised.

They are asked to evaluate value at a given time, and the time at which a given value is reached. They are asked when the machine has no value, and the range of times over which the model is valid. They are also asked to explain the physical meaning of the gradient.

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Provided with information on a sample with sample mean and known population variance, use the z test to either or reject a given null hypothesis. One sided.

Determine the mechanical advantage of a pair of compound lopping shears.