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mechanics ii

1. A loaded railway wagon has a mass of 15 tonnes and moves along a leveltrack at 20 km/h. It over takes and collides with an empty wagon of mass 5 tonnes, which is movingalong the same track at 12 km/h. If the each wagon is fitted with two buffer springs of stiffness 1000kN/m, find the maximum deflection of each spring during impact and the speeds of the wagonsimmediately after impact ends.If the coefficient of restitution for the buffer springs is 0.5, how would the final speeds beaffected and what amount of energy will be dissipated during impact ?

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