physics
posted by vicki .
a device has a 100g wooden shuttle that is pulled along a square woooden rail by an elastic band. the shuttle is released when the elastic band has 9.0 N tension at a 45 degree angle. what is the magnitude of the initial acceleration of the shuttle?

F=ma
What are the forces on the shuttle
a> gravity
b> rubber band. the force of gravity down the rail is mg*.707
90.1*9.8*.707=0.1*a
solve for a 
thanks, how did you get the .707 though?
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