15.3.7. Cab swings suspended on two bars in length l = 0,5 m. Determine the car speed when passing its lower position, if at the initial moment of the rods were bent at an angle φ = 60 ° and released without initial velocity.

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(Chapter 3 - Dynamics theme - 15.3: The theorem of change of kinetic energy of the material point and rigid body in translation) from Reshebnik to the collection of short tasks on the theoretical mechanics Kep OE, JA Viba, OP Grapis, JA Svetinysh et al. Publishing Moscow / Graduate School / 1989, 2009, 2012.
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