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26-02-2024
Physics

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A plank of mass 50 kg and length 3.4 sresting horizontally on two trestles, and wch are 2distance of 2.50 m apart. when a student of mass 60 kgwalks along the plank from one trestle to the other, the plastsags (a) explain why the sag increases as the student walkstowards the middle of the plank

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