1.1 What is friction? Take this everyday example: when a coffee mug rests on a flat table, the kinetic frictional force is zero. There is no force trying to move the mug across the table, so there is ...

When a bottleneck makes a task hard or slow, it often leads to overthinking, procrastination, and emotional stress. Sometimes ...

Customer effort is both the most important and the most overlooked factor in building true customer loyalty. Unnecessary effort, a.k.a. friction, is particularly damaging. Starting a friction log will ...

This is a cooler physics problem than I initially realized. It goes something like this. A block has a mass of 1 kg and is placed on a vertical wall such that the coefficient of static friction is 0.5 ...