The diagram shows a block of mass 10 kg suspended below a horizontal ceiling by two...

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The diagram shows a block of mass 10 kg suspended below a horizontal ceiling by two strings AC and BC, of lengths 0.8m and 0.6 m respectively, attached to fixed points on the ceiling. Angle ACB = 90. There is a horizontal force of magnitude FN acting on the block. The block is in equilibrium. (a) In the case where F = 20, find the tensions in each of the strings. [5] (b) Find the greatest value of F for which the block remains in equilibrium in the position shown. [3] A 0.8 m C 0.6 m FN 10 kg B The diagram shows a block of mass 10 kg suspended below a horizontal ceiling by two strings AC and BC, of lengths 0.8m and 0.6 m respectively, attached to fixed points on the ceiling. Angle ACB = 90. There is a horizontal force of magnitude FN acting on the block. The block is in equilibrium. (a) In the case where F = 20, find the tensions in each of the strings. [5] (b) Find the greatest value of F for which the block remains in equilibrium in the position shown. [3] A 0.8 m C 0.6 m FN 10 kg B