Hey guys, I don't seem to be able to get the right answer for this question eventhough I really thought I was going about it in the right way, here it is:
A uniform disk can rotate around its center like a merrygoround. The disk has a radius of 2.00 cm and a mass of 20.0 grams and is initially at rest. Starting at time t = 0, two forces are to be applied tangentially to the rim, so that at time t = 1.25 s the disk has an angular velocity of 250 rad/s counterclockwise. Force F1 has a magnitude of 0.100 N. What is the magnitude of F2?

They answer they got was 0.140 N and I got 0.02 N.