Two blocks are connected by massless string that is wrapped around a pulley. Block 1 has a mass m1=6.10 kg, block 2 has a mass m2=1.30 kg, while the pulley has a mass of 1.80 kg and a radius of 28.3 cm. When the pulley turns, there is friction in the axel that exerts a torque of magnitude 0.580 N m.
If block 1 is released from rest at a height h=1.40 m, how long does it take to drop to the floor?