Google's latest animated Doodle celebrates the quadratic equation, transforming its homepage into an interactive classroom.

Mr. Rattner, a contributing Opinion writer, served as counselor to the Treasury secretary in the Obama administration. All the political skirmishing around the looming government shutdown has obscured ...

A journey describes the motion of an object over time. A journey can be represented using a distance-time graph. The graph will show when an object is moving and when it is stationary. The graph can ...

When an object is falling, the two main forces acting on it are weight close weightA force that acts on mass, pulling it down, due to gravity. Weight is a force and forces are measured in newtons (N).