JEE Mains · Physics · STD 11 - 9.1 fluid mechanics
Figure below shows a liquid being pushed out of the tube by a piston having area of cross section \(2.0\,cm ^2\). The area of cross section at the outlet is \(10\,mm ^2\). If the piston is pushed at a speed of \(4\,cm s ^{-1}\), the speed of outgoing fluidis \(.........\,cm s ^{-1}\).
- A \(70\)
- B \(60\)
- C \(80\)
- D \(50\)
Answer & Solution
Correct Answer
(C) \(80\)
Step-by-step Solution
Detailed explanation
By equation of continuity \(A _1 V _1= A _2 V _2\) \(V _2=\frac{2 \times 4}{10 \times 10^{-2}}=80\,cm / s\)
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