A small body attached at the end of an inextensible string...

A small body attached at the end of an inextensible string completes a vertical circle, then its A. total mechanical energy remains constant B. linear momentum remains constant C. angular velocity remains constant D. angular momentum remains constant

Transcript

00:01 We are given here small body that are attreated with end of the inextensible string complete a vertical circle so we can write here we have small body we have we are given here small body and is attached with end of legs here it is attached with which we can write end of inextensible we can write in extension stable extensible extrinsible string and it's complete a complete of so it complete the vertical circle it completes the vertical circle so it complete the vertical circle so we can write here then it is a we are given a four option option a where in the option if we are given here total mechanical energy the domain constant that's a total mechanical energy remain caution option b we are given linear moment moment of option c we are given angular velocity remain constant option d we are given a angular momentum only ribbon constant here we have a small body that attach it with an inextricable string and completely vertical circle here completely vertical circle so let's find out so we know that the mass of the system here we can write the mass of the system is constant so here mass is constant here and this is no word done any external force this is no external force is acting means no force or we can say no force is acting means force here or we can say no external force no external force is acting here and only forces forces acting is perpendicular to velocity of the wall here only force is acting is tension force is acting and tension force is denoted by here t is perpendicular to velocity it is perpendicular to velocity v so that that we can that is velocity of ball and we know that the work done here is zero that is 4 to 0 means walk done here is 0 the double is 0 here so we can write here the w is 0 mechanical so that mechanical energy of the system is consul so that we know that the walk is zero so we can write mechanical energy we can energy of system of system which is equal to is conzo.

02:34 Megan energy is consul.

02:36 So, we can write, which of the option is correct.

02:38 So here, consor means option a is correct...

Question

A small body attached at the end of an inextensible string completes a vertical circle, then its A. total mechanical energy remains constant B. linear momentum remains constant C. angular velocity remains constant D. angular momentum remains constant

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