Why does a less dense body when forceful, Physics

Assignment Help:

I have tried to do an experiment where i tried to check the direction of the net force by water on a body. I have some question regarding some concepts. I took an empty sealed bottle and forcefully inserted it in a tub of water completely immersed at a certain depth. Now, as soon as i release my hand from the bottle, the bottle comes up but most amazingly i see that the bottle kind of rotates in the clockwise direction and aligns parallel to the liquid surface and finally floats on the liquid surface. I assumed that the bottle is cylindrical and i tried to calculate the pressure forces (including the weight of the bottle) on all the surfaces of the bottle. I have resolved all these forces in the X- Z direction and found that the net force acts at an angle to the X axis i.e in the X-Z plane. If thats the case, then the bottle should have accelerated in that direction but what i found was that the bottle rotated in the clockwise direction as if there was a net resultant force which acted perpendicular to the axis of the bottle. I am really curious why did the bottle not move in the direction of the net resultant force and moved in a different direction?

Ans)If you suppose the body to be a perfect cylinder, then all pressure forces and weight of the body should balance out to produce a net translational upward force. Though, in non-ideal conditions, the body is not a perfect cylinder and the force you applied is not perfectly perpendicular to the liquids surface. Therefore Bouyoncy acts slightly off the COM to compensate for your imperfect force and therefore produces torque about COM, causing the body to rotate untill it reaches equilibrium (parallel to the surface).


Related Discussions:- Why does a less dense body when forceful

Define - drift velocity, Q Define: Drift velocity. Drift velocity is de...

Q Define: Drift velocity. Drift velocity is described as the velocity with which free electrons get drifted towards the positive terminal, when an electric field is applied.

Find the x-component of the electric field, Presume that you are given an e...

Presume that you are given an expression for the electric potential V(x,y) as a function of x and y valid for points in the first quadrant of a Cartesian coordinate system and aske

Schrodinger''s time independent wave equation: free particle , Q.   Write d...

Q.   Write down the Schrodinger's time independent wave equation for a free particle confined in one dimensional box of size a. Obtain eigen values and normalized wave functions fo

Force, Force: Force may be defined as a push or a pull upon an object. ...

Force: Force may be defined as a push or a pull upon an object.  In the English system the pound (1b) is used to express the value of a force.  For example, we say that a force

Distinguish between electric power and electric energy, Q. Distinguish betw...

Q. Distinguish between electric power and electric energy. Electric power i) Electric power is described as the rate of doing electric work. ii) Electric power is the cre

Calculate the local value of g, An astronaut on a small planet wishes to me...

An astronaut on a small planet wishes to measure the local value of  g  by timing pulses traveling down a wire which hasa large object suspended from it. Assume a wire of mass3.50

Temporal coherance, how can we conclude whether at some time interference w...

how can we conclude whether at some time interference will take place or not with the help of the concept of temporal coherence?

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd