How is erasing blackboard with duster both push and pull
How is erasing blackboard with duster both push and pull 4
with a straw
n we press the
of a magnetic 1
Dear Student , When we rub the board,we push the duster against the blackboard to rub.The duster attracts the chalk particles and pulls them to it and in this order rubs the things written on it.Hence it is both push and pull.