Express the Equation of Motion in Equation (1) in terms of the displacement θ1​(t) about an equilibrium position θe​, i.

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answerhappygod
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Express the Equation of Motion in Equation (1) in terms of the displacement θ1​(t) about an equilibrium position θe​, i.

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Express the Equation of Motion in Equation (1) in terms of the displacement θ1​(t) about an equilibrium position θe​, i.e., θ(t)=θe​+θ1​(t). Simplify this nonlinear equation, if possible, but do not linearise it yet. Do not substitute values for θe​ yet.
J0​θ¨+Kr​θ−Lg(M+21​m)sinθ=0
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