Constraint relation 01
Using constraint equations, show that the relationship between a 1 and a 2 can be expressed as a 2 = α × a 1 . Find α .
Assume both the pulleys and string are light and friction is absent everywhere. Where a 1 and a 2 are vectors.
The answer is -7.
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1 solution
come on never thought negative answers allowed kept putting 7 and getting it wrong
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In Brilliant you cannot answer 7 three times, I think you have viewed solution
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yeah frustrated as i was getting same answer again and again nice problem btw
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@Rohith M.Athreya – try my nice problems " speck of dust" and "speck of dust returns" not original but very nice!!
@Rohith M.Athreya – Thanks, you were familiar about the trick ??
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@Raj Rajput – yeah we learnt stuff like this in detail
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@Rohith M.Athreya – You are in which class??
Bro Please write answer with direction or put a vector sign over acceleration in question.otherwise it seems we are talking about magnitude only unless a vector sign is there
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@Prakhar Bindal – Yes ,I will take care about that next time, it is handwritten cannot be edited ..... :)
Man! I was also having the same confusion.
I'm not very good at classical mechanics, how do you know that tension is inversely proportional to acceleration?
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Thats called virtual work method for constraints @Shaun Leong
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try my problem too, https://brilliant.org/problems/another-troublesome-cylinder/ .....btw i kept entering 7 and then entered random values as i got frustrated y the ans is not 7 !!
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@A Former Brilliant Member – yeah! nice problem :)
mention that a1 and a2 are vectors
Got wrong ! Entered 7 and saw the solution :( Btw Another short trick is using the formula 1/ 2^n -1 . And doing it verbally :)
sorry, i be confused by this questions, please can you make understand me? Tikka
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Read the solution once again, you will get it
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I not sure still. Korma
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@Pauline Salter – there is trick shown above, a relation used for finding relations between acceleration, velocities and displacement for 2 blocks that is T is invesely proportional to a . Assume acceleration of block 1 a and its tension t and acceleration of block 2 A and its tension T use proportionality relation, constant used will be cancelled and you will get relation.
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@Raj Rajput – make sense nows, thank s for helps. usually i find maths difficult so I do naan
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@Pauline Salter – who are you ??
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@Raj Rajput – My name is Pauline, I am old now so I saag (at maths)
sorry for my english bad Vindapoo