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What is the acceleration due to gravity at the space station.

This online tutorial will explain the earth's shape and its hemispheres.

This video looks at the exterior angles of polygons.

Why do astronauts appear weightless despite being near the Earth?

Basics of gravity and the Law of Universal Gravitation.

This unit is about how things move along a straight line or, more scientifically, how things move in one dimension. Examples of this would be the movement (motion) of cars along a straight road or of trains along straight railway tracks.

Speed necessary for the space station to stay in orbit.

Viewing g as the value of Earth's gravitational field near the surface rather than the acceleration due to gravity near Earth's surface for an object in freefall.

This video explains what polygons are.

What would fall faster on the moon, a brick or a feather?