Sophia Learning
Sophia: Improperly Defining a System
This presentation explains why a poorly defined system can lead to incorrect answers in physics problems.
Sophia Learning
Sophia: Free Body Diagram: Lesson 2
This lesson introduces the concept of the free-body diagram. It is 2 of 2 in the series titled "Free-Body Diagram."
Sophia Learning
Sophia: Forces in a Rope & Pulley System: Lesson 2
This lesson explains what forces are acting on objects which are at rest or moving in a rope and pulley system. It is 2 of 2 in the series titled "Forces in a Rope & Pulley System."