An air puck of mass of 0.026kg is tired to a string and allowed to revolve in a circle of radius 1.3m on a frictionless horizontal surface. the other end of a string passes through a hole in the center of the surface, and mass of 1.1 kg is tired to it, as shown. the suspended mass remains in equilibrium while the puck reviles on the surface. what is the magnitude of the force that maintains circular motion acting on the puck?