Instructional Video
Khan Academy

Khan Academy: More on Normal Force (Shoe on Floor)

9th - 10th
This video explains how to determine the normal force for a variety of scenarios (extra forces, diagonal forces, acceleration) involving a shoe on the floor. [10:44]
Instructional Video
Khan Academy

Khan Academy: More on Normal Force (Shoe on Wall)

9th - 10th
This video shows how to determine the normal force for a shoe shoved against a wall with a diagonal force. [6:46]
Instructional Video
Khan Academy

Khan Academy: Mild and Medium Tension

9th - 10th
Kahn Academy explains how to solve tension problems for hanging objects. [17:29]