IIT JEE , AIEEE Forum - Physics , General - OUT OF 8 COINS 1 IS SLIGHTLY HEAVIER THAN OTHER HOW TO DISTINGUISH BY ANALYZING GIFT F AN

ziauddin75

OUT OF 8 COINS 1 IS SLIGHTLY HEAVIER THAN OTHER HOW TO DISTINGUISH BY ANALYZING GIFT FOR SELECTED ANSWERS REGARDING BITS PREPARATIONS

mukundmadhav

two groups of 4.. whichever is heavier contains the coin.
Now two groups of 2
Then weigh separately

ziauddin75

BY ANALYZING
TAKING 4 COINS IN 1 HAND AND 4 IN OTHER CAN YU ANALYZA WHICH ONE IS HEAVIER ANY OTHER GOOD SOLUTION PLZ

mukundmadhav

If you don't wanna weigh, i can think of one more method..
Take a glass of water. One which sinks fastest is the heavier one

monarchs

from the computations point -

a. 3 and 3, this will tell which 3 or 2 (remaining) have it
b. if grp of 3 has then take 1, 1,
Or if a says grp of 2 then also take 1,1

so this is better as you can save no of tries.. min tries needed 2, max 3

mujtaba4iit

Take a transparent trough full of water and a cardboard on which u can place the 8 coins in succession. Now place the cardboard on the rim of the trough and tilt it so that all the coins enter the water at the same time.
Now, observe the coins.
The coin which reaches the bottom first is the heavier one.
This method can do ur work in first attempt.

divinexsoul

easy

ROLL THEM DOWN AN ENCLINED PLANE

HEAVIER ONE WILL REACH FIRST!!

CONSIDERING COIN AS A DISC I=1/2MR(SQUARE)

AND $g'=g/\sqrt{1+I/MR{}^{2}}$ would be same for all since mass will cancel

but in mg' the greater mass coin wins

ravi00

heyyy take 8 coins
7 will be in uniform weight and 1 will b heavier
let uniform weight of coin be 1 gm nd heavier be x
1st weigh 1 coin and den 2 coin nd den 3 coins nd so on wen der is change in weight den it wil b d heavier coin

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