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n.hirsch1
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Homework Statement
A child exerts a tangential 41.6 N force on the rim of a disk-shaped merry-go-round with a radius of 2.40 m.
If the merry-go-round starts at rest and acquires an angular speed of 0.0850 rev/s in 3.50 s, what is its mass?
Homework Equations
torque = r * F
(I + mr^2) ω / t = torque
I of a solid disk = 1/2 mr^2
The Attempt at a Solution
I found the tangential torque to be 99.84 N/m, and set the momentum equation to it, plugging in the moment of inertia. I got 713.7, and the answer is 227 kg. What am I doing wrong?