Homework Help: physics help i still dont get it

Posted by justin on Monday, October 22, 2012 at 4:56pm.

A picture of width 43.0 cm, weighing 52.0 N, hangs from a nail by means of flexible wire attached to the sides of the picture frame. The midpoint of the wire passes over the nail, which is 2.50 cm higher than the points where the wire is attached to the frame. Find the tension in the wire.

physics help i still dont get it - Elena, Monday, October 22, 2012 at 5:02pm
sinα =2,5/sqrt{2.5²+(43/2)²}
m•g=2•T•sinα
T=m•g/2•sinα
physics help i still dont get it - justin, Monday, October 22, 2012 at 5:07pm
ill try it but i have no idea how you get the angle appreciate it
physics help i still dont get it - Elena, Monday, October 22, 2012 at 5:17pm
sinα =2,5/sqrt{2.5²+(43/2)²} =0.116
m•g=2•T•sinα
T=m•g/2•sinα =52/2•0.116 =225 N
physics help i still dont get it - justin, Monday, October 22, 2012 at 5:21pm
Thank you so much but its just upsetting me i cant figure it out
physics help i still dont get it - justin, Monday, October 22, 2012 at 5:23pm
i forgot to divide the sqrt by 2.5 to get .116 sorry but thank u

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