A child is sitting on a plank attached to a
thick steel pillar which is turning at a constant
rate in anticlockwise sense as shown in the given figure.
Which option correctly states and explains the direction
of friction acting on the child at a given instant?
ATowards P, to counter centripetal force.
BTowards Q, to counter centripetal force.
CTowards Q, to provide centripetal force.
DTowards P, to provide centripetal force.