Physics question Mass in a Hoop?

Posted on 2016-04-05 18:57:00 in Physics by RACHEE

A mass M of 6.00E-1 kg slides inside a hoop of radius R=1.60 m with negligible friction. When M is at the top, it has a speed of 5.57 m/s. Calculate the size of the force with which the M pushes on the hoop when M is at an angle of 43.0°. 

I have tried this a couple different ways so I know the answer is not: 5.25N or 10.49N 
I don't know what I am doing wrong with this one Thank you for your help in advance.

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