Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now! :gravitation/x6679aa2c65c01e53:falling-objects/v/falling_objects Want to explore more? Check out the full gravitation playlist here: If two objects are dropped from the same height in a vacuum, they accelerate at the same rate and hit the ground at the same time. This happens because an object's gravitational mass is equal to its inertial mass. As a result, any object in free fall near Earth's surface accelerates at m/s/s. The gravitational force acting on an object is not always equal to its weight. A free falling object experiences a gravitational force, but also appears weightless because there is no normal force pushing up on it. Sections: 00:00 - Intro 00:26 - Free fall 02:31 - Air resistance 03:55 - Falling motion with air resistance 05:19 - Free fall vs falling through air 05:36 - Weightlessness 08:46 - Projectile motion ------------------ 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: Volunteer here: