This question came up in my physics holiday homework and I can't seem to get the correct answer :( 1. The problem statement, all variables and given/known data A 4.0 kg magpie lands in the middle of a perfectly horizontal plastic wire on a clothes line stretched between two poles 4.0 m apart. The magpie lands in the centre of the wire depressing it by a distance of 4.0 cm. What is the magnitude on the tension in the wire? 2. Relevant equations N/A 3. The attempt at a solution Created a triangle with angle theta at the centre of the clothes line with a hypotenuse of 2 m (as its half the clothes line) and the side opposite the angle being 0.04 m (the 4cm depression). Solving for theta yields 1.146 degrees Now I have a new triangle (same angle to the horizon though) with the opposite side equal to 40 to represent the upwards tension supporting the bird ( we use g=10...) and solve for the hypotenuse: 10/sin(1.146) = 2.0 x 10^3 N However the answer in the book is 1000. Thanks for any help!