San Francisco 49ers

This new content was added to Khan Academy on March 16th, 2016.

Sal Kahn is asked about football physics by the SF players, and he answers them in the videos.

The video lessons are:
 * Why is it good to throw a spiral?
 * To kick or not to kick?
 * How many footballs would fit in Levi’s® Stadium?
 * Can fans affect the outcome of a football game?
 * Football or pigskin?
 * Newton's first law of motion
 * Newton's second law of motion
 * Newton's third law of motion
 * Solar power