Recent content by Phys185Help

Also tried this: Net torque = I * α I = (.5 * 3.2kg * .185m2) = .0548 kg*m2 α = ((350rpm / 60 s) - 0) * 2π / 2.4s = 15.27 rad/s Net torque = .0548 * 15.27 = .8363 Nm Net torque = F * radius .8363 = F * .185 F = 4.52 N This one seems more correct but I've done it wrong so many times I don't...

Homework Statement The 3.2kg , 37-cm-diameter disk in the figure is spinning at 350 rpm . How much friction force must the brake apply to the rim to bring the disk to a halt in 2.4s? Homework Equations F = m * a I = (1/2) * mass * radius2 (I probably need to use this but I can't figure...