The 200g model rocket,Angular acceleration

[Lydia22]

Homework Statement

The 200g model rocket shown in figure 13.24 generates 4.0Nthrust. It spins in a horizontal circle at the end of a 100g rigid rod. what is its angular acceleration?
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Homework Equations

The Attempt at a Solution

Tnet= F*d= 4.0sin45*0.6
=1.70N.m
angular acc=Tnet/MR^2 =1.70/0.2*(0.6)^2
=23.57 rad/s

 

[azizlwl]

The total moment of inertia is I of rocket plus I of rod.