21 In the given figure the rough hofizontal surface has a

Last updated: 6/9/2023

21 In the given figure the rough hofizontal surface has a frictionless vertical groove A massless bar can move freely into the vertical groove It is attached to a spring of force constant k Now two solid spheres each of mass M are rotated to high angular velocity and placed in the corners as shown The co efficient of kinetic friction between the spheres and the bar and between the spheres and the horizontal surface isu Then the compression of the spring is 2 Mg A B C D 1 p Mg Mg 1 k Mg k M 0 000000 0 M