10.9 -. The flywheel of an engine has moment of inertia 1.60 kg . me about its rotation axis. What constant torque is re- quired to bring it up to an angular speed of 400 rev/min in 8.00 s, starting from rest? 10.8 .. A uniform disk with mass 40.0 kg and radius 0.200 m is pivoted al it's center about a horizontal, frictionless axle that is stationary. The disk is initially at rest. and then a constant force F = 30.0 N is applied tangent to the rim of the disk, (a) What is the magnitude & of the tangential velocity of a point on the rim of the disk after the disk has turned through 0.200 revolution? (b) What is the magnitude a of the resultant acceleration of a point on the rim of the disk after the disk has turned through 0.200 revolution? 10.12 . CP A stone is suspended from the free end of a wire that is wrapped around the outer rim of a pulley, similar to what is shown in Fig 10.10. The pulley is a uniform disk with mass 10.0 kg and radius 30.0 cm and turns on frictionless bearings. You measure that the stone travels 12.6 m in the first 3.00 s starting from rest. Find (a) the mass of the stone and (b) the tension in the wire