Freefall and Aerodynamic Drag

Freefall and Aerodynamic Drag

Early theories about the motion of falling objects; characteristics of objects in freefall; how the shape,cross sectional area and mass of different objects affect the speed of objects in freefall; the hammer and feather experiment as carried out on the Moon in 1971; two different types of freefall ; Felix Baumgartner’s incredible jump from the edge of space; reaching terminal velocity.

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Gravity, Mass and Weight

Gravity, Mass and Weight

How astronauts’ mass remains constant no matter what planet they visit; how weight would change on different planets as a result of differing forces of gravitational attraction. How measuring your weight actually measures the force of gravitational attraction between you and the planet you are visiting. A ‘true’ story about a quick way Homer Simpson could lose weight visiting different planets!

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Is there force of gravity in space?

Is there force of gravity in space?

This science teaching resource considers the issue of ‘weightlessness’ and addresses the common misconception that ‘weightlessness’ means there can be little or no gravity in space.The reasons why astronauts appear to ‘float’ in space are explained; rockets need to reach high velocities in orbit and the spherical shape of the Earth means that the surface of the Earth is forever disappearing.

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Understanding Gravity and Mass

Understanding Gravity and Mass

An introduction to the force of gravity. The meaning of ‘mass’ and how we need to understand ‘mass’ before can understand ‘gravity’. Gravity is discussed with reference to planet earth, the moon and the Solar System. We look at examples of gravitational forces and how the forces of gravity affect our everyday lives. The gravitational force the sun exerts on the planets in our solar system.

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