Exam

JEE Main

Year

2025

Date

22 January

Shift

Evening Shift

Subject

Physics

Chapter

Mechanical Properties of Fluids

JEE Main 2025 · 22 January · Evening Shift · Physics · Mechanical Properties of Fluids

A tube of length L is shown in the figure. The radius of cross...

A tube of length $L$ is shown in the figure. The radius of cross section at the point (1) is 2 cm and at the point (2) is 1 cm , respectively. If the velocity of water entering at point (1) is $2 \mathrm{~m} / \mathrm{s}$, then velocity of water leaving the point (2) will be

Step-by-step solution

$$\begin{aligned} & \mathrm{A}_1 \mathrm{~V}_1=\mathrm{A}_2 \mathrm{~V}_2 \Rightarrow 2 \pi(2 \mathrm{R})^2=\mathrm{V}_2 \pi \mathrm{R}^2 \\ & \therefore \mathrm{~V}_2=8 \mathrm{~m} / \mathrm{s}\end{aligned}$$