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 .

Options

A. Speed of bead is 4m/sec
B. Elongation in spring is 10 cm
C. If we cut the string , normal force due to wire on bead is `20sqrt5N`.
D. If we cut the spring , normal force due to wire is `20sqrt5N`.

Answer

A,C,D