Khan Academy

Motion as a function of time: Resistive force example (part 2) | 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 A resistive (drag) force is a velocity-dependent force which acts opposite the direction of an object’s velocity. Applying Newton’s second law to an object experiencing a resistive force 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 functions are exponential and have asymptotes that are determined by the initial conditions and the forces exerted on the object. Sections: 00:00 - Intro 01:49 - Finding the acceleration function 05:02 - Intuition behind the acceleration function 07:34 - Finding the position function intuitively 09:58 - More about drag force ------------------ 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