Question

Assertion (A): When a thin flat plate is held parallel to a fluid stream, both pressure drag as well as viscous drag will be negligible.
Reason (R): The total drag on the plate will be entirely due to shear stress and pressure drag will be negligible.

• A. Both (A) and (R) are correct and (R) is the correct explanation of (A)
• B. Both (A) and (R) are correct but (R) is not the correct explanation of (A)
• C. (A) is correct but (R) is not correct
• D. (A) is not correct but (R) is correct

Hint:

Parallel plate → only skin friction drag exists, not pressure drag.

Answer 1

The Correct Option is D