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

This video explains the angles of elevation and depression.

Part 1: Equivalent fractions and the simplest form of a fraction
Part 2: Examples of equivalent fractions
Part 3: Common mistakes and misconceptions

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.

Part 1: Proper, improper and mixed fractions
Part 2: Examples of proper, improper and mixed fractions
Part 3: Common mistakes and misconceptions

Speed necessary for the space station to stay in orbit.

Use two methods to find the sum of mixed numbers: improper fractions and mixed numbers

An online application to test your knowledge of evaluating trigonometric functions of special angles.