Question

Choose the incorrect statement from the following:

• A. Fluid friction depends on the shape of the moving object.
• B. Fluid friction always opposes the relative motion.
• C. Fluid friction does not depend on the nature of the medium.
• D. Fluid friction increases with an increase in relative speed.

Answer 1

The correct option is C Fluid friction does not depend on the nature of the medium.

Friction always opposes relative motion, be it of any kind.

Frictional force experienced by a body moving in a fluid medium depends on:

- Shape of the body
- Nature of the medium
- Speed of the body

Fluid friction or drag increases with an increase in relative speed of the medium and the body.