# Drag - The component of total force exerted by fluid on a body - Fluid Mechanics

Q.  The component of the total force exerted by fluid on a body in the direction parallel to the direction of motion is called as
- Published on 05 Aug 15

a. lift
b. drag
c. both a. and b.
d. none of the above

#### Discussion

• Pankaj   -Posted on 05 Oct 15
Whenever a body is moving over a relatively stationary fluid or a fluid is flowing over stationary body or both the body and the fluid are in motion, a force is exerted by the fluid on the body.

The fluid motion is unsteady, when a body is moving at a constant speed in stationary fluid. Whereas the fluid motion is steady, when the body is stationary and the fluid is flowing at constant speed. The force exerted by the fluid on the moving body is inclined to the direction of motion.

The component of the total force exerted by fluid on a body in the direction parallel to the direction of motion is called as drag. Drag force is proportional to the velocity of laminar flow and the squared velocity of turbulent flow.

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