Product Description
Video and lesson investigations on the topic of aerofoils and balanced forces. Key concepts include:
- The shape of an aeroplane’s wings helps it to keep up in the air.
- Air has further to travel over the top surface than the underside.
The movement of air around an aerofoil can be observed in a wind tunnel with the aid of smoke. - The faster moving air on the top surface of the wing is more ‘spread out’, weakening the force of air pressure.
- ‘Lift’ occurs because the force of air pressure below is stronger (the forces are not balanced).
- The faster the air moves across the surface, the less pressure it exerts on the surface.
- Air travels faster over the top surface of an aerofoil due to the curved shape of its top side.
- This phenomenon gives aeroplanes their ‘lift’.
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