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Chapter 5 Upthrust In Fluids Archimedes Principle And Floatation | Exercise 5A

Question 27

A body will experience minimum upthrust when it is completely immersed in:

(a) Turpentine

(b) Water

(c) Glycerine

(d) Mercury

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  • Solution

  • Transcript

(a) Turpentine

Lesser the density of the liquid, the lesser the upthrust experienced by a body. Amongst these, turpentine has the least density

"students welcome to leader learning this is ashwini i teach science at lado so here in this question as a body will experience minimum of thirst when it is completely immersed in a turpentine b water c glycerine and d mercury so here we can say that what is up thirst years first i would like to explain the uptest that when a body is immersed in liquid okay so suppose this is the body okay and this is water our liquid is water here now if i am saying that the body is having its weight we can write it as wg and the liquid is also having its weight or volume we can write it as wl so here the liquid will exert every liquid will exert a force on that object which is going to immersed in its surface okay immersed in it so we are immersing this object in the liquid so here the liquid will or the water will exerting a force in the upward direction on the object so this force is represented as f a this is known as up thirst force this force will make this object to float if this f a is greater than or equals to the weight of the object then the object will float okay and if the second thing if the fa is lesser than the weight of the object then the object will sink because the weight of the object is more here and up thirst force is less so the object will sink now here the minimum of thirst is phase in this liquid the answer is top in time why is it so the answer is up in time because the density of the liquid is lesser than the up thirst experienced by a body the turpentine has least density so let's see the densities of all the liquids the turpentine is having zero point eight six five zero point eight six five gram per centimeter cube okay now i'm talking about water then it is one gram per centimeter cube and if i'm talking about glycerin then it is 1.26 grams per cubic centimeter and for the fourth one is mercury it is 5.43 gram per cubic centimeter so which one is the least least one is this top in time which is less than the water itself so the answer is lesser the density of the liquid lesser the up thirst experienced by a body because we see that the fa is equals to the wl okay if the force up thoughts force is equals to the weight of the liquid okay whatever will be the weight of the liquid it is equals to the upthirst force that is fa exerted by the liquid on the object so here the answer is stop indict i hope everything is clear to you if you have any doubts then please put it down in the comment section for more such video solutions please subscribe leader learning thank you"

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Question 27

A body will experience minimum upthrust when it is completely immersed in:

(a) Turpentine

(b) Water

(c) Glycerine

(d) Mercury

  • Solution

  • Transcript

(a) Turpentine

Lesser the density of the liquid, the lesser the upthrust experienced by a body. Amongst these, turpentine has the least density

"students welcome to leader learning this is ashwini i teach science at lado so here in this question as a body will experience minimum of thirst when it is completely immersed in a turpentine b water c glycerine and d mercury so here we can say that what is up thirst years first i would like to explain the uptest that when a body is immersed in liquid okay so suppose this is the body okay and this is water our liquid is water here now if i am saying that the body is having its weight we can write it as wg and the liquid is also having its weight or volume we can write it as wl so here the liquid will exert every liquid will exert a force on that object which is going to immersed in its surface okay immersed in it so we are immersing this object in the liquid so here the liquid will or the water will exerting a force in the upward direction on the object so this force is represented as f a this is known as up thirst force this force will make this object to float if this f a is greater than or equals to the weight of the object then the object will float okay and if the second thing if the fa is lesser than the weight of the object then the object will sink because the weight of the object is more here and up thirst force is less so the object will sink now here the minimum of thirst is phase in this liquid the answer is top in time why is it so the answer is up in time because the density of the liquid is lesser than the up thirst experienced by a body the turpentine has least density so let's see the densities of all the liquids the turpentine is having zero point eight six five zero point eight six five gram per centimeter cube okay now i'm talking about water then it is one gram per centimeter cube and if i'm talking about glycerin then it is 1.26 grams per cubic centimeter and for the fourth one is mercury it is 5.43 gram per cubic centimeter so which one is the least least one is this top in time which is less than the water itself so the answer is lesser the density of the liquid lesser the up thirst experienced by a body because we see that the fa is equals to the wl okay if the force up thoughts force is equals to the weight of the liquid okay whatever will be the weight of the liquid it is equals to the upthirst force that is fa exerted by the liquid on the object so here the answer is stop indict i hope everything is clear to you if you have any doubts then please put it down in the comment section for more such video solutions please subscribe leader learning thank you"

Our top 5% students will be awarded a special scholarship to Lido.

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