Potential energy problem pls help

[xgoodtimesx]

The potential energy in space is given as a function of polar coordinates by the following:


U(r , therta) = Acos therta / r^2


Given that A = 46 N∙m3, determine the x-component of the corresponding force at the location x = 1.7 m, y = 1.2 m.

pls derive a formula to solve this equation

 

[tiny-tim]

Hi xgoodtimesx!

Show us what you've tried, and where you're stuck, and then we'll know how to help!

 

[xgoodtimesx]

Hi tim,

the problem is i don't even know where to start x_X stuck in the begining