I have another question that I can't make any sense of...

A particle of mass 4kg is suspended from a point A on a vertical wall by a light inextensible string of length 130am.

a) A horizontal force, P, is applied to the particleso that it is held in equilibrium 50cm from the wall. Find the value of P and the tension in the string.

No problem with this part P =16.4N and T= 42.5N

b) By drawing a triangle of forces or otherwise, find the direction and magnitude of the minimum force that would hold the particle in this position.

This bit has me stumped. Any hints would be much appreciated.

Thanks :)