A traffic light weigh 235 Nt. It is supported by 2 wires cal the tension of each of the wires(adsbygoogle = window.adsbygoogle || []).push({});

T1 has an angle of 21 degrees

T2 has an angle of 38 degrees

There is no sag in the light

I have 2 equations

equ 1) Fx = T2 cos 38 - T1 cos 21 = 0

equ 2) Fy = T1 sin 21 + T2 sin 38 = 0

I set T2 = to T1

T2 = T1 (cos 21 / cos 38) = 1.2 T1

then subsitutedthat into equatin 2

T1 sin 21 + (1.2 T1)(sin 38) - 235 Nt = 0

T1 = 214 N

T2 = 1.2T1= 1.2(214)

T2 = 257 N

I think iI went about this in the right way i think

thanks

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# Homework Help: Traffic light problem

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