Question

Consider the gate shown, hinged at AB and a mass of 1000 kg with oil with specific gravity 0.941. In order to prevent the gate from opening, the Mechanics B class decide to step onto the upper surface of the gate. Where should they stand, and why? What is the minimum number of students required to keep the gate from opening, assuming that the average mass of a Mechanics B student is 62 kg?

Fig: 1

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