JEE Main 2022 · 29 Jul · Shift 2 · Physics Q51

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PhysicsInteger+4 / -1Question 51 of 90

A tube of length 50 cm is filled completely with an incompressible liquid of mass 250 g and closed at both ends. The tube is then rotated in horizontal plane about one of its ends with a uniform angular velocity $x\sqrt F$ rad s $^{-1}$ . If F be the force exerted by the liquid at the other end then the value of $x$ will be _______.

Your answer

Answer and worked solution

Official answer: 4

Centripetal force on the liquid acts at its centre of mass: $F=m\omega^2\frac L2=0.25\cdot x^2F\cdot0.25$ , so $x^2=16$ , $x=4$ .

Answer: 4

Topics:Circular motion dynamics

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JEE Main 2022 · 29 Jul · Shift 2, Physics question 51