By request from a local school: Invisible Forces! You can’t see gravity—but you can certainly see its effects. And it works at a distance—you don’t need to be in contact with the earth to feel its pull. We say that the earth has a gravitational field around it—and if you are in the field, you […]
In this episode, we look at different objects in free fall. When you drop an object from a high height, and it is in the air, there are no forces acting on it other than gravity. This is called free fall. Can objects fall faster than free fall? It turns out an outstretched slinky can, because of the force of the bottom pulling the top down!