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 ...

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 ...

I see you’re a Road Runner fan, Stephen, although one of that small subset that wonders, on seeing Wile E. Coyote deploy a piano, anvil or roadside explosive from Acme Products: Is this technically ...