A spider builds its web in a window frame that is lying on the ground. It is supported by four main strands. Calculate the force of tension in strand 4 assuming the web is stable. The tensions in the other three strands are as follows:(adsbygoogle = window.adsbygoogle || []).push({});

strand 1: 21 mN (20 degrees East of North)

strand 2: 16 mN (60 degrees East of South)

strand 3: 18 mN (40 degrees West of South)

if i solve y

T1 cos20(0.021N)

=0.019 N

T2 cos60(0.016N)

=0.008 N

T3 cos 40(0.018N)

=0.013 N

T4 y total 0.014

solve for x

sin20(0.021N)

=0.00718 N

sin60(0.016)

=0.013 N

sin(40)(0.018N)

=0.011N

T4 x total 0.0162

c squared = 0.0162 squared + 0.014 squared

c=0.0214

tan theta = 0.014/0.0162 = 0.0214 N40.8W degrees

is this correct?

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# Homework Help: Is this correct? (spider web tension question)

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