Free Fall Video

This video is exactly like the presentation Mrs. Lawrence did in class when she had the tube and the feathers and penny's. In this video a man first shows a tube that has air in it and contains feathers and penny's. When there is air in the tube the penny's hit the bottom before the feathers. Because there is air in the tube, there is air resistance. Air resistance is a force that pulls an object up. The heavier the object, the harder it is for the air resistance to catch up with its gravity pulling it to the bottom. The lighter the object, the easier it is for the air resistance to resist the object from falling as fast. This is exactly like the penny's and feathers. The penny has a greater mass so the air resistance is not as fast to try and stop the object. The feathers are lighter so the air resistance is greater. When the tube has no air in it, there is no air resistance acting on the object, only gravity. Because there is no air force, the objects fall at the same time because in free fall, gravity is always constant no matter the mass of an object. The gravity will always be 9.8 or 10 in labs.

This video was very useful because it clearly shows the differences of air resistance and free fall. Free fall NEVER has air resistance so no matter where the object is, it always has a gravitational force of 10 and an acceleration of 10 m/s2 because acceleration is proportional to gravity in free fall. I hope this video helped!