A block is placed on a surface with vertical cross
section given by the equation y = 20
x2
. If the
coefficient of friction is 0.5, the maximum height
above the ground at which a block can be placed
without slipping is (Bottom most point of surface
is taken as origin and on ground) -
(A) 1.00 m (B) 1.25 m
(C) 1.50 m (D) 1.90 m