Do you need some practice with force diagrams for your introductory (or advanced) physics course? Here are three questions (and the last one is awesome) about the motion of a bike as it is pulled.

Typically, the first task when setting up a mechanics problem is to create a force diagram – a diagram of the magnitude and direction of all forces involved in a system. One challenge in ...

The author uses analytical computation with systematic tabulation, and also, as an alternative method, graphical diagrams based on a clever adaptation of the ordinary bending and shearing force ...