Explain drag and lift in fluid flow
Drag is the force that a fluid exerts on the surface of the fluid flow that is in the direction of the flow. Lift is the force that a fluid exerts on a surface that is perpendicular to the direction of the flow.
Explain the drag coefficient and the lift coefficient
Dc & Lc are dimensionless numbers that represent the drag and lift characteristics of a body in a fluid flow. It is calculated from drag force/(0.5*density*velocity2*Area).
Different shapes such as a sphere and a cone of a given angle have different experimentally determined drag coefficients.