SaraNextGen Study App [2022-23]
Last Updated On 23-10-2022 - By Sara

A rod of mass ‘M’ and length ‘2L’ is suspended at its middle by a wire.  It exhibits torsional oscillations; if two masses each of ‘m’ are attached at distance ‘L/2’ from its centre on both sides, it reduces the oscillation frequency by 20% The value of ratio m/M is close to:


Question ID - 50114 :-

A rod of mass ‘M’ and length ‘2L’ is suspended at its middle by a wire.  It exhibits torsional oscillations; if two masses each of ‘m’ are attached at distance ‘L/2’ from its centre on both sides, it reduces the oscillation frequency by 20% The value of ratio m/M is close to:

1 Answer
5876 Votes
3537

Answer Key : (0.375) -

Frequency of torsonal oscillations is given by

f=

f1 =

f 2=

f2 = 0.8 f1

 = 0.375



Next Question :

ABCD is a square. E is the mid-point of BC and F is the mid-point of CD. The ratio of the area of triangle AEF to the area of the square ABCD is 

(a)

1:2

(b)

1:3

(c)

1:4

(d)

3:8


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