A 20.0 kg floodlight in a park is supported at the end of a horizontal beam of negligible mass that is hinged to a pole. A cable at an angle of 30.0[tex]\circ[/tex] with the beam helps to support the light. Find (a) the tension in the cable and (b) the horizontal and vertical forces exerted on the beam by the pole.(adsbygoogle = window.adsbygoogle || []).push({});

This is what I got so far:

[tex]\sum F_y = T\sin30.0\circ - W = 0[/tex]

[tex]\sum F_y = T(\frac{1}{2}) = 196 N[/tex]

[tex]T = 392 N[/tex]

I'm having trouble with part (b). I know I'm supposed to use [tex]\sum\tau = 0[/tex] but I'm getting stuck because I don't know what to use for the moment arm(if I'm supposed to)

Anything would help, thanks in advance

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# Find (a) the tension in the cable

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