Determine the unknown mass that is being balanced by a known mass for a meter stick balanced at its center of mass (50.0 cm mark).

Determine the unknown mass that is being balanced by two known masses for a meter stick balanced at its center of mass (50.0 cm mark).

A brief lesson about the inter-workings of gravity and inertia.

Did you know the rising and falling of the sea level is caused by the gravity of the Moon and the Sun? Kids learn about ocean tides including tidal currents and types of tides on this site.

Investigate what keeps us grounded and who spent a lot of time studying its details. How does gravity impact plant growth?