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Alright, this is the problem:

Calculate the torque about the front support of a diving board exerted by a 70kg person 3.0m from that support

here's the picture:

________________person

|<-1.0m->|<--3.0m-->:

^ ^ ^

| | |

F1 F2 CG

Alright this is what i have done so far:

[tex]\sum T = 0 [/tex]

[tex]\sum T = m*g*d_F1-F2 - m_p *g*d_F2-person = 0[/tex]

[tex]\sum T = m*g* 1.0m - 70.kg * g *3.0m = 0[/tex]

[tex] m*g*1.0m = 70.kg*g*3.0m[/tex]

[tex] m = (70.kg*g*3.0m)/(g*1.0m)[/tex]

[tex]m = 210kg [/tex]

I know the answer is supposed to be 2.1 x 10^3 m*N, but i don't know what to do after finding the mass on F1; can someone help me?

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# Torque help

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