## Introductory Work due to Friction equals Change in Mechanical Energy Problem (8:58)

The equation Work due to Friction equals Change in Mechanical Energy can often be confusing for students. This video is a step-by-step introduction in how to use the formula to solve a problem. This is an AP Physics 1 topic.
Content Times: 0:09 The problem 1:29 Why we can use this equation in this problem 1:52 Expanding the equation 2:29 Identifying Initial and Final Points and the Horizontal Zero Line 3:00 Substituting into the left hand side of the equation 4:05 Deciding which Mechanical Energies are present 4:59 Where did all that Kinetic Energy go? 5:27 Identifying which variables we know and do not know 5:58 Solving for the Force Normal 6:57 Substituting Force Normal back into the original equation 8:09 Why isn’t our answer negative? |