ball attached to string attached to wall, find force against wall

1. The problem statement, all variables and given/known data
A solid uniform 50kg ball of diameter 30cm is supported against a vertical frictionless wall using a thin 35cm wire of negligible mass (the wire is attached to the wall, the ball is attached to the wire and rests against the wall). Make a free body diagram for the ball and use it to find the tension in the wire. How hard does the ball push against the wall?

2. Relevant equations

∑Fx = max
∑Fy = may
(no given equations – these are ones i would fine useful)

3. The attempt at a solution

i have no idea how to set up this problem. i know free body diagrams, but i don’t know how to orient my coordinate system for this problem. Please don’t help me solve the problem, but pleasepleaseplease help me with how to set it up.

http://ift.tt/1g1WnC9

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