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Q.

Two blocks of masses 'm' and '3m' joined by means of a light spring are on a horizontal surface. They are pushed towards each other and released. If the frictional force acting on them is same, the ratio of distances traveled by them before coming to rest is

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a

1 :3

b

1: 9

c

9 : 1

d

3 : 1       

answer is B.

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Detailed Solution

F.S=p22m

s∝1M⇒s1s2=m2m1

s1s2=3mm=3:1

               

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