How to Find Force Between Blocks with Friction

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How to find force between blocks with friction problems. This covers tension and contact force or when blocks (or boxes) are pulled with ropes and strings as well was when blocks are pushed up against each other. This force is often called a contact force, or even a normal force.

This video demonstrates how to write a system of net force equations and solve for acceleration. Using this acceleration you can calculate the tension or contact force between two or three blocks, boxes, or other objects.

This example problem is very similar to what you would find on the AP Physics 1 or C Mechanics exam and is helpful in preparing for the AP Physics Test.