1.

A bead is moving on a frictionless fixed circular wire of radius 0.8 m in horizontal plane with constant speed & there is no interaction force between bead & wire & it is also connected with string & spring .

Answer»

Speed of bead is 4m/sec
Elongation in spring is 10 cm
If we CUT the STRING , normal FORCE due to WIRE on bead is `20sqrt5N`.
If we cut the spring , normal force due to wireis `20sqrt5N`.

Answer :A,C,D


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