A particle initially at rest starts moving from point A on the surface of a fixed smooth hemisphere of radius r as shown. The particle looses its contact with hemisphere at point B. C is centre of the hemisphere. The equaion relating a and B is a) 3sina = 2cosB b) 2sina-3 cos c) 3sin = 2cosa d) 2sin=3cosa 9 B A small ball of mass I kg is given vertical velocity of magnitude v, = 5 m/s and it swings in a vertical plane by the help of a light string of length 2m fixed at one end. The breaking strength of string is 20N. a) String does not break before reaching at lowest point 1=2m b) string breakes before reaching at lowest point Vo isg c) the aceleration of the ball just after angle 0=cos d) None of above