# 46 - Mechanics Part 2 Questions Answers

Dear Sir kindly help provide the solution along with right approach to solve such questions

**Asked By: RK GUPTA**

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**Joshi sir comment**

On a horizontal floor, two identical cylindrical vessels A and B connected by a thin tube near their bottoms contain some water. When an ice block of volume 100cm^3 is gently put inside the vessel A, it gets half submerged in the water. How much mass of water will flow through the connecting tube during the process of melting of the ice cube? (Density of water=1000kg/m^3 and Density of ice=900kg/m^3)

**Asked By: PARTHSARTHY**

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**Asked By: KANDUKURI ASHISH**

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**Joshi sir comment**

Due to inner sphere attraction, outer sphere contracts so it is compressive stress.$GravitationalforceisG\left(\rho 4\pi {R}^{2}t\right)\left[\pi {(R\theta /2)}^{2}\right]/4{R}^{2}\phantom{\rule{0ex}{0ex}}Outwardforceduetostress=S\left[2\pi \right(R\theta /2\left)t\right](\theta /2)\phantom{\rule{0ex}{0ex}}Nowcompare.\phantom{\rule{0ex}{0ex}}Informforanyissueandwaitforvideo$

**Asked By: KANDUKURI ASHISH**

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**Joshi sir comment**

By Bernoullis theorem, velocity of water jet = $\sqrt{2gh}$Water jet comes out perpendicular to surface.

make its horizontal and vertical components

By vertical component, calculate time, then use it with

horizontal velocity component to get distance along x axis

Finally calculate distance from centre, along x axis

Inform for any confusion

A solid sphere is subjected to uniform pressure from all direction. The ratio of volumetric strain to lateral strain produced in it, is

**Asked By: SWATI KAPOOR**

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**Joshi sir comment**

V = 4/3 πr^{3}

so dV = 4πr^{2}

now calculate dV/V

What is the length of a wire whose density is 8 g/cm^{3}, which suspended vertically, would break due to its own weight? [Breaking stress of wire is 2.4 x 10^{8} N/m^{2}]

**Asked By: SWATI KAPOOR**

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**Joshi sir comment**

use stress = force/area