As a result, any object in free fall near Earth's surface accelerates at 9.81 m/s/s. The gravitational force acting on an object is not always equal to its weight. A free falling object experiences a ...

It doesn't seem like such a difficult question, but it always brings up great discussions. If you drop a heavy object and a low mass object from the same height at the same time, which will hit the ...

Our motion perception is remarkably well tuned to detect small changes in speed and direction. For example, soccer goalkeepers need to precisely judge the speed, direction, and curvature of an ...

There are various methods to measure acceleration due to gravity. At Higher level all rely on one of the equations of motion. The measurements required will depend on the equation used. Watch this ...

Source: NOVA: "Galileo's Battle for the Heavens" This resource can be found on the NOVA: "Galileo's Battle for the Heavens" Web site. The motion of objects fascinated Galileo throughout his life. When ...