Could somebody explain 11 to me with steps please? Thank you! A massless diving

Question

Could somebody explain 11 to me with steps please?

Thank you!

A massless diving board of length A is held in place by two posts; one at the left end (L) and one in the center (C) which exert forces F vector_L and F_c on the board. A person of mass m walks a distance x out onto the board from the left end as shown in the diagram. When x = 3/4A, what is the torque exerted by the the person around the left end (L) of the diving board? 3mgA/4 into the page mgA/4 into the page 3mgA/4 out of the page mgA/4 out of the page mg A down If m = 61kg and x = 3/4A what is the magnitude of the force exerted by the central post (C); in other words, what is |F vector_c|? 300N 400N 600N 900N This cannot be determined without knowing A

Explanation / Answer

the correct option is e.

because, to calculate the force Fc, we must need distance from C to person position. with out knowing A we will not calculate the distance x and force at C

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