- #1
Bishop556
- 37
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Homework Statement
A uniform beam of mass m = 0.6 kg and length L = 0.3 m can rotate about an axle through its center. Four forces are acting on it as shown in the figure. Their magnitudes are F1 = 1.5 N, F2 = 1.5 N, F3 = 1.5 N and F4 = 1.5 N. F2 acts a distance d = 0.12 m from the center of mass.
What is the angular acceleration?
Homework Equations
I = Ʃmr^2
I = ∫(r^2)dm
α = Ʃτ/I
The Attempt at a Solution
I = (0.6 kg)(0.15 m)^2 +(0.6 kg)(0.12 m)^2 + (.6 kg)(0.15)^2 = 0.03564 kgm^2
Ʃτ = 0.225 + 0.127 = 0.352 Nm
α = 0.352/0.03564 = 9.88 rad/s^2
This is apparently the wrong answer and I don't know where I messed up. [STRIKE][/STRIKE]