fluid mechanics
introduction
movement of an object through the air is called projectile motion
movement in water is negatively impacted by drag
Movement on land is negatively impacted by air resistance
factors affecting air resistance and drag
frontal cross-sectionals area
velocity
surface characteristics
mass
streamlining and shape
the greater the velocity of an object the greater the air resistance and drag acting on an object
how much of a surface you present to the air
the smaller the frontal cross sectional area of the object the less effect air resistance will have on it
smooth shaped surface characteristics will be less negatively impacted on by air resistance and drag
if an object is relatively heavy, air resistance will have less of an effect than it would on a lighter object
creating a shape that allows air to travel effectively around the body and or object, negating the impact of resisting forces
Bernoulli's principle
states that air will travel faster over the top of the projectile and, therefore, create an area of lower pressure above the projectile. lift will then be applied to the projectile when air moves from the area of high pressure to the area of low pressure
aerofoil
angle of attack creates the aerofoil
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