Gravity, from falling apples to curved spacetime.

Drag the test object or launch it sideways. Change mass and distance to see the orbit, vectors, and equations respond.

3.98 Nforce
9.81 m/s²acceleration
7.91 km/sorbital speed
stable orbittrajectory

Gravity is not a hidden rope. It is the measurable way mass-energy shapes motion, usefully predicted by Newton and more deeply explained by Einstein.

Force falls with distance squared

Double the distance and the attraction becomes one quarter as strong. Hover the curve to move the test object.

The useful equation

F = G m₁m₂ / r²

Mass increases attraction linearly; distance weakens it quadratically.

Equivalence elevator

The floor pushes upward on you, producing the sensation called weight.

Quick knowledge check

Why does an orbiting satellite keep missing Earth?

Enjoy this tool? Build your own with Super