NIce ones in SHM

Find time period of rod in both cases
1)
Rod is hinged about centre...Distance a,b are measured from COM and c distance from point where string is tied

2)

Rod is free to move,The strings are at extremes of rod

16 Answers

1
Philip Calvert ·

yeah we could combine both o' them to make a better question !

24
eureka123 ·

u cna put 1000 springs and blocks.....but this ques is not by me....

i am still trying to reach its answer

24
eureka123 ·

ya,in first case.....

2nd case its free

1
akari ·

is the answer for the first one
ω=√(12/ml2 (k1a2 + k3b2) )???

1
Che ·

may i know the source of des Q's
or
u made them up......

24
eureka123 ·

are u sure there is no term involving k2 ???

vaise i dont have the answer....and on seing ur ans i feel its ok..becoz i am getting something very loong....and am unable to find 2 variables [2]

i will reply soon.....by then if u want to post ur own soln u can....

@thejoker.....had i made this up i would have told that openly..i dont need to hide that dude[1]

24
eureka123 ·

why ??

1
sanchit ·

cud anyone please provide the solution

1
harsh jindal ·

I THINK QUESTION ONE IS NOT OF S.H.M
IF WE ROTATE THE ROD IN A.C.W DIRECTION THEN THERE IS NO ROLE OF K1 AND M1 (THE STRING BECOMES LOOSE AND DO NOT EXERT ANY FORCE)
IF WE ROTATE THE ROD IN C.W DIRECTION THEN THERE IS EFFECTIVE ROLE OF K1 AND M1

49
Subhomoy Bakshi ·

I QUOTE................

""IF WE ROTATE THE ROD IN A.C.W DIRECTION THEN THERE IS NO ROLE OF K1 AND M1 (THE STRING BECOMES LOOSE AND DO NOT EXERT ANY FORCE)""

I do not agree................[2][2][2]

1
rajatjain_ix ·

the ans is..
1) T= 2∩√[(m1b+ML2/2)/(k3a2+k1b2-(c+b)2k2)]

1
harsh jindal ·

@subhomoy~~ATGS
I AGREE THAT MOTION IS PERIODIC ((((BUT NOT S.H.M))))
(FOR UNDERSTANDING TRY THIS QUESTION IN PARTS .i.e, WHEN ROD IS CONNECT ONLY WITH ONE OF THREE COMBINATIONS OF STRING AND SPRINGS) IT WILL SHOW THAT IT IS NOT IN S.H.M WITH M1 , M2 , K1 , K2

49
Subhomoy Bakshi ·

yes now me too agree.......good point out indeed.....

1
harsh jindal ·

subhomoy~~ATGS
SECOND QUESTION IS ALSO NOT FROM S.H.M
lol
lol
ROTATE THE BIGGER ROD IN A.C.W DIRECTION (THE STRING BECOME AGAIN FREE)

49
Subhomoy Bakshi ·

pata hai yaaar..............but how to do these types of sums??????????are we getting these in JEE?????????[17][17][17]

1
harsh jindal ·

we don't get any very tough problem in IIT ...
all questions of IIT Entrance are checked at least 100 times by IIT teachers ...
all questions will be conceptual with little calculations....
so don't worry ...we are able to get ranks in top 500...[1][1]

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