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The electrostatic potential due to a point charge is calculated at three points, who of which are at the same distance but different directions.  This relates to the idea that the equipoptentials of a point charge are spheres centred on the charge, so all points at the same distance are at the same potential.

This question requires unit conversion, numerical calculations and some critical evaluation.

Simple numerical evaluation using a given formula.

Concepts and calculation involved in the use of Coulomb's Law for both the field and the force, including units and directions.

Simple calculation of a Coulomb force between two point charges to highlight the importance of units and the inclusion of the correct constants.

Homework set.  Frame and machine problems.

Homework set.  More frame and machine problems.

Homework set.  Frame and machine problems.

Homework set.  Uniformly and uniformly varying distributed loads.

Homework set.  Trusses solved using the method of sections

Homework set.  Identify zero force members and utilize special loading conditions to simplify trusses.