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A spider is resting after starting to spin its web. The gravitational force on the spider is 0.165 N on the junction of three strands of silk. The junction is supported by different tension forces in the two strands above it so that the resultant force on the junction is zero. The two sloping strands are perpendicular (the 2 strands above it), and we have chosen the x and y directions to be along them. The tension Tx is 0.112 N.

(a) Find the tension Ty.

N

(b) Find the angle the x axis makes with the horizontal.

°

(c) Find the angle the y axis makes with the horizontal.

°

My attempt at this:

For the first one I did

0.165-0.112-x=0

so x=0.053

which was wrong (because I thought the resultant force =0)

I think the second and third depend on the first.

but if I get the first maybe my answer to the second and third may be

cos^-1(y(the first one)/the magnitude)?

I am not sure where to start really, can someone point me in the right direction?

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# Homework Help: Resultant force and angles please help.

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