a thin rod is fixed on one end and rotate in a vertical motion. Its period of oscillation is pi s . It is now held in the horizontal position and let go. An ant happen to cling in to the rod at distance 1 m from the pivot. Find the contact forcce the rod exert on the ants when it swing to the lowest position. Express the mag. of the force in terms of the ant's body weight. When it reaches the equilibrium position, the aceleration is 0. hence the net force acting on ant in the horizontal direction should be 0. Only friction and the weight of the ant act on it . Is this way of doing correct , if not , please explain to me how?