Question
Physics Question on mechanical properties of fluid
A thin stainless steel needle can lay floating on a still water surface. Any object floats when the buoyancy force balances the weight of the object.
A
If both assertion and reason are true and reason is the correct explanation of the assertion
B
If both assertion and reason are true but reason is not the correct explanation of the assertion
C
If assertion is true, but reason is false
D
Both assertion and reason are false statements
Answer
If both assertion and reason are true but reason is not the correct explanation of the assertion
Explanation
Solution
A and R are true. But R does not explain A. Explanation of A is that it is the surface tension of the water surface which is balancing the weight of the steel needle.