Two blocks are arranged at the ends of a massless string as shown in the figure. The system starts from rest. When the 2.26 kg mass has fallen through 0.43 m, its downward speed is 1.31 m/s. The acceleration of gravity is 9.8 m/s. 3.7 kg 2.26 kg What is the frictional force between the 3.7 kg mass and the table? Answer in units of N.