Speed-time graphs are very useful when describing the movement of an object. This is a velocity time graph of an object moving in a straight line due North. The displacement of this object is the area ...

If a velocity-time graph of the motion shows a rising or falling line, this means that the velocity is changing. Therefore the forces acting must be unbalanced, and the skydiver is accelerating or ...

One must get the methods of measuring position and time working together if we are to obtain a reliable representation of motion. To that end we have developed a unique system composed of elements ...