MHT CET · Physics · Mechanical Properties of Fluids
A paper disc of radius ' R ' from which a circular hole of radius ' r ' is cut out, is floating in a liquid of surface tension ' \(T\) '. The force on the disc due to surface tension will be
- A \(\pi \mathrm{RT}\)
- B \(2 \pi(R+r) T\)
- C \(\pi(R+r) T\)
- D \(4 \pi(R+r) T\)
Answer & Solution
Correct Answer
(B) \(2 \pi(R+r) T\)
Step-by-step Solution
Detailed explanation
\(L = 2\pi R + 2\pi r\) \(L = 2\pi (R+r)\)
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