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Motion as a function of time: Friction example | AP Physics | Khan Academy

Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now. https://www.khanacademy.org/science/ap-physics-c-mechanics Applying Newton’s second law to a moving object experiencing kinetic friction results in a differential equation for velocity. The differential equation can be solved to find the object’s velocity as a function of time. The velocity function can then be used to find the object’s acceleration and position as functions of time through differentiation and integration, respectively. The force is constant while the object moves, so we find the velocity function is linear and the position function is quadratic. Sections: 00:00 - Intro 00:33 - Kinetic friction 03:08 - Drawing the free-body diagram 04:56 - Finding the acceleration function 06:24 - Finding the velocity function 09:46 - Finding the position function 12:32 - Summary ------------------ Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help! Donate here: https://www.khanacademy.org/donate?utm_source=youtube&utm_medium=desc Volunteer here: https://www.khanacademy.org/contribute?utm_source=youtube&utm_medium=desc