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

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

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TopNewestThe 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 · 5 months, 4 weeks ago

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– Brilliant Member · 5 months, 4 weeks ago

bas bi kar pura lecture lagaega kya ? :PLog in to reply

– Spandan Senapati · 5 months, 4 weeks ago

Don't mind your handwriting isn't good.although legibleLog in to reply

– Brilliant Member · 5 months, 4 weeks ago

achha thik hai. :(Log in to reply

– A E · 5 months, 4 weeks ago

Ab handwriting pe fight mat karo bhaiyon...Log in to reply

– Brilliant Member · 5 months, 4 weeks ago

maine to kuch kaha hi ni ! , koi aur question de na yaar :)Log in to reply

– A E · 5 months, 4 weeks ago

Ruk kaal Deta hoon a hi mai abhi sone jaa raha hoon !!!!Log in to reply

– Brilliant Member · 5 months, 4 weeks ago

kai saarre laio , waisse toh mujhe module bhi shuru kar ne hai , phir bhi :)Log in to reply

– A E · 5 months, 4 weeks ago

Yaa.... sureLog in to reply

– Brilliant Member · 5 months, 4 weeks ago

l'm the only one from my center not to even start doing my coaching modules while others have finished it :\Log in to reply

– A E · 5 months, 4 weeks ago

Modules se accha hai kuch achhe books karna ,uske bad modules relatively easy lagenge....Log in to reply

– Brilliant Member · 5 months, 4 weeks ago

abe time kaha hai ? ab to cbse aur 2 ko mains :!Log in to reply

– A E · 5 months, 4 weeks ago

Bas Chem hi bacha hoga na ?Log in to reply

– Brilliant Member · 5 months, 4 weeks ago

sare subject , mera bura haal hai ::Log in to reply

– A E · 5 months, 4 weeks ago

OK then all the best.....be positive mains accha hoga aur adv bhiLog in to reply

– Brilliant Member · 5 months, 4 weeks ago

thnx bhai , as long as bhais like you r around me no mains-advance can stop me :) (hopefully:P)Log in to reply

– A E · 5 months, 4 weeks ago

Yes ....study hard you will rock both the exams. Good night.Log in to reply

– Brilliant Member · 5 months, 4 weeks ago

yep gd........tc :DLog in to reply

– A E · 5 months, 4 weeks ago

ok ....thanks for help!!!Log in to reply

Oye @A E – Brilliant Member · 5 months, 4 weeks ago

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– Brilliant Member · 5 months, 4 weeks ago

kidhar hai bhai ?Log in to reply

– A E · 5 months, 4 weeks ago

Ghar pe.Log in to reply

– Brilliant Member · 5 months, 4 weeks ago

mera net slow hai :P pehle likha thaLog in to reply

– A E · 5 months, 4 weeks ago

yeh question INPHO 2009 ka tha .Log in to reply

– Spandan Senapati · 5 months, 4 weeks ago

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.Log in to reply

– A E · 5 months, 4 weeks ago

yaa ......great observation.Log in to reply

– Spandan Senapati · 5 months, 4 weeks ago

And only one part of the curl will be in motion as the other will be with the ground itself.(so rest)☺☺Log in to reply

– Brilliant Member · 5 months, 4 weeks ago

oh ! samaj aa gya ke ?Log in to reply

– A E · 5 months, 4 weeks ago

haan aa gya.....itna physics kaise aata hai bhai?????Log in to reply

– Brilliant Member · 5 months, 4 weeks ago

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 :PLog in to reply

– A E · 5 months, 4 weeks ago

yeh 2nd solution mein 1/2 mv^2 ko kisse equate kiya hai....dikhai nahi de raha ?Log in to reply

– Brilliant Member · 5 months, 4 weeks ago

F*l ( force *length )Log in to reply

– A E · 5 months, 4 weeks ago

achha thik hai..Log in to reply

– Brilliant Member · 5 months, 4 weeks ago

online whole day :(Log in to reply

– A E · 5 months, 4 weeks ago

Yes....reading the solutionLog in to reply

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 ?

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How to solve this? : momentum change= force :) – Brilliant Member · 5 months, 4 weeks ago

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– A E · 5 months, 4 weeks ago

But using this answer comes as hv^2Log in to reply

– Brilliant Member · 5 months, 4 weeks ago

which one is given as answer ?Log in to reply

– A E · 5 months, 4 weeks ago

hv^2/2Log in to reply

ha! did it a long time ago ! :P – Brilliant Member · 5 months, 4 weeks ago

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– A E · 5 months, 4 weeks ago

I told you ....you are awesome in physicsLog in to reply

@Spandan Senapati @shubham dhull. @Swapnil Das – A E · 5 months, 4 weeks ago

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– Swapnil Das · 5 months, 3 weeks ago

Hey, that was a nice question!Log in to reply

– A E · 5 months, 3 weeks ago

Thanks.....try previous years inpho papers they are awesome.Log in to reply

– Swapnil Das · 5 months, 3 weeks ago

Yup, they are.Log in to reply