Khan Academy Static

We've all slid down slides/snow-or-mud-covered-hills/railings at some point in our life (if not, you haven't really lived) and noticed that the smoother the surface the more we would accelerate (try to slide down a non-snow-or-mud-covered hill). This tutorial looks into this in some depth. We'll look at masses on inclined planes and think about static and kinetic friction.

9953_Force_of_friction_keeping_the_block_stationary.html

9954_Correction_to_force_of_friction_keeping_the_block_stationary.html

9957_Static_and_kinetic_friction_example.html

9956_Intuition_on_static_and_kinetic_friction_comparisons.html

9952_Ice_accelerating_down_an_incline.html

9951_Inclined_plane_force_components.html

9955_Force_of_friction_keeping_velocity_constant.html