Fluid mechanics

Question 1

4 factors that affect drag and air resistance

Answer 1

1. velocity - the faster the velocity the greater air resistance and drag
2. front cross-sectional area - the smaller area the less air resistance
3. surface characteristics - the smoother the shape the less negative impact of air resistance and drag
4. mass - the heavier the object, the more impact of air resistance

Question 2

what is Bernoulli’s principle

Answer 2

Bernoulli’s Principle states that an increase in the velocity (speed) of a fluid (like air) results in a decrease in pressure.

This difference in pressure can generate lift or movement in a particular direction.
- Where a fluid moves faster, pressure is lower.
- Where a fluid moves slower, pressure is higher.

Question 3

what is surface drag

Answer 3

the friction between the boundary layer of fluid and surface of object, many sports want to decrease this

Question 4

what is form drag

Answer 4

the force affecting the leading edge of an object, no longer concerned with friction but with the shape