11AB ISSM MEIN AAGE KYA KARNA HAI
ISN'T THE ANSWER (B)
hoW TO DO THIS UN BY ENERGY METHD ???
maine thoda kiya par aage [7]
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16 Answers
21IT IS B..........
WOH JO BOTTOM RITE main likha hai wo step GALAT hai, as i hav not differetiated x in that........ th one on the left is crrct ..........
11yaar jab hum thoda sa displace karenge to velocity kahan se aaegi
24@ tapan........stick to one method and master that...if u r comfortable with force method and have already done this question by that method dont try to do by other method.....
at least at this point of time....
21Dude, i m not dat gr8 at these Time period Questns...........
So if i knoe ENERGie methd than I can use it..........
If u knoe how to use energie methd in dis un pl telll
11bichhara tapan ghante ka pooch raha hai
bhai ki help to kar do
i htink #4 is sufficient but he needs more[1]
21ha ha thnx 4 ppropaganda.......
I want to knoe the Applctn of Energie methd in such situations is liye pura methd mang raha huun...........
24tapan bhai mujhe energy method bilkul nahin aata...........isliye sorry i cant help u..........
1mg(H-x) + ky2/2 +mv2/2 =constant.....
y=x/2...by constraint.....
where x= displacement of mass m
y= displacement of pulley= extension in spring.....
differentiating.......
-mgv + kxv/4 +mva = 0...
where v=velocity and a =acceleration....
net acceleration....
a-g = anet = -kx/4m.....
therefore, time period = 4Π√m/k
11a-g = anet = -kx/4m.....
therefore, time period = 4Π√m/k
yeh samjha de bhai!!!!!!!!!
106let me try:
equilibrium position is T=mg and 2T = kx
so, x = 2mg/k... = y (say)
if we displace the block by distance x downwards, then spring extends x/2 downwards.
So, mv2/2 + k(x/2+y)2/2 - mgx = const.
taking derivative wrt time,
mva + kxv/4 + kyv/2 - mgv = 0
==> ma + kx/4 + ky/2 - mg = 0
==> ma + kx/4 + k*2mg/2k - mg = 0
==> ma = -(k/4)x
==> a = -(k/4m)x
==> ω = √k/4m
So T = 2Î √4m/k
= 4Î √m/k
1@manipal....
arey yaar hamain acceleration find out karni hai na..toh a-g bhi toh uski net acceleration hi toh hai......
aur agar usme problem a rahi ho toh.... asish ne jo kiya hai woh bhi thik hai....