Physics doubt!

How to solve this? I understand that we need to use force as vdm/dt but the answer doesn't match?

Note by Brilliant Member
1 year, 9 months ago

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The best part is I could perform this at home after solving.just take a slinky tie its end and make a curl and move it.you will get it.

Spandan Senapati - 1 year, 9 months ago

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bas bi kar pura lecture lagaega kya ? :P

Brilliant Member - 1 year, 9 months ago

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Don't mind your handwriting isn't good.although legible

Spandan Senapati - 1 year, 9 months ago

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@Spandan Senapati achha thik hai. :(

Brilliant Member - 1 year, 9 months ago

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@Brilliant Member Ab handwriting pe fight mat karo bhaiyon...

Brilliant Member - 1 year, 9 months ago

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@Brilliant Member maine to kuch kaha hi ni ! , koi aur question de na yaar :)

Brilliant Member - 1 year, 9 months ago

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@Brilliant Member Ruk kaal Deta hoon a hi mai abhi sone jaa raha hoon !!!!

Brilliant Member - 1 year, 9 months ago

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@Brilliant Member kai saarre laio , waisse toh mujhe module bhi shuru kar ne hai , phir bhi :)

Brilliant Member - 1 year, 9 months ago

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@Brilliant Member Yaa.... sure

Brilliant Member - 1 year, 9 months ago

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@Brilliant Member l'm the only one from my center not to even start doing my coaching modules while others have finished it :\

Brilliant Member - 1 year, 9 months ago

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@Brilliant Member Modules se accha hai kuch achhe books karna ,uske bad modules relatively easy lagenge....

Brilliant Member - 1 year, 9 months ago

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@Brilliant Member abe time kaha hai ? ab to cbse aur 2 ko mains :!

Brilliant Member - 1 year, 9 months ago

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@Brilliant Member Bas Chem hi bacha hoga na ?

Brilliant Member - 1 year, 9 months ago

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@Brilliant Member sare subject , mera bura haal hai ::

Brilliant Member - 1 year, 9 months ago

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@Brilliant Member OK then all the best.....be positive mains accha hoga aur adv bhi

Brilliant Member - 1 year, 9 months ago

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@Brilliant Member thnx bhai , as long as bhais like you r around me no mains-advance can stop me :) (hopefully:P)

Brilliant Member - 1 year, 9 months ago

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@Brilliant Member Yes ....study hard you will rock both the exams. Good night.

Brilliant Member - 1 year, 9 months ago

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@Brilliant Member yep gd........tc :D

Brilliant Member - 1 year, 9 months ago

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ok ....thanks for help!!!

Brilliant Member - 1 year, 9 months ago

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Oye @A E

Brilliant Member - 1 year, 9 months ago

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kidhar hai bhai ?

Brilliant Member - 1 year, 9 months ago

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Ghar pe.

Brilliant Member - 1 year, 9 months ago

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@Brilliant Member mera net slow hai :P pehle likha tha

Brilliant Member - 1 year, 9 months ago

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@Brilliant Member yeh question INPHO 2009 ka tha .

Brilliant Member - 1 year, 9 months ago

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@Brilliant Member Ya I got kv^2/2.it will be misleading for many I guess to mark kv^2.but if the part held goes a distance of vt then the part coming to motion will have a length of vt/2.its quite apparent and easy to analyse if the part held goes vt then the part that will be available to come to motion must be vt as length is conserved but this appears in the curl with 2 half length of (vt/2)each!!!so now we can use f=vdm/dt =vd(kvt/2)/dt=kv^2/2.

Spandan Senapati - 1 year, 9 months ago

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@Spandan Senapati yaa ......great observation.

Brilliant Member - 1 year, 9 months ago

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@Brilliant Member And only one part of the curl will be in motion as the other will be with the ground itself.(so rest)☺☺

Spandan Senapati - 1 year, 9 months ago

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@Brilliant Member oh ! samaj aa gya ke ?

Brilliant Member - 1 year, 9 months ago

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@Brilliant Member haan aa gya.....itna physics kaise aata hai bhai?????

Brilliant Member - 1 year, 9 months ago

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@Brilliant Member are mein to kuch bi nhi hue yaar , bhai hoga to yeh Q dubara mat poocheyo plz , meri padai ke mamle mein bezzati kr liya kr besak :) P.S i hardly studied today :P

Brilliant Member - 1 year, 9 months ago

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@Brilliant Member yeh 2nd solution mein 1/2 mv^2 ko kisse equate kiya hai....dikhai nahi de raha ?

Brilliant Member - 1 year, 9 months ago

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@Brilliant Member F*l ( force *length )

Brilliant Member - 1 year, 9 months ago

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@Brilliant Member achha thik hai..

Brilliant Member - 1 year, 9 months ago

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@Brilliant Member online whole day :(

Brilliant Member - 1 year, 9 months ago

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Yes....reading the solution

Brilliant Member - 1 year, 9 months ago

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shit ! i wrote it on paper and clicked pic to show you , displaced the power cord a little and boom , computer off. after then solved 4 level 5's and wrote their solution , upvote them too :P le dekh le

samaj aa gya ?

samaj aa gya ?

Brilliant Member - 1 year, 9 months ago

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How to solve this? : momentum change= force :)

Brilliant Member - 1 year, 9 months ago

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But using this answer comes as hv^2

Brilliant Member - 1 year, 9 months ago

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which one is given as answer ?

Brilliant Member - 1 year, 9 months ago

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@Brilliant Member hv^2/2

Brilliant Member - 1 year, 9 months ago

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ha! did it a long time ago ! :P

Brilliant Member - 1 year, 9 months ago

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I told you ....you are awesome in physics

Brilliant Member - 1 year, 9 months ago

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@Spandan Senapati @shubham dhull. @Swapnil Das

Brilliant Member - 1 year, 9 months ago

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Hey, that was a nice question!

Swapnil Das - 1 year, 9 months ago

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Thanks.....try previous years inpho papers they are awesome.

Brilliant Member - 1 year, 9 months ago

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@Brilliant Member Yup, they are.

Swapnil Das - 1 year, 9 months ago

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