I missed the section on static friction and I can't get this question. Can someone help me out? What mass can you hang onto the string so that the 0.8kg box will just begin to move? The 0.8kg box is sitting on a flat surface with a coefficient of friction of 0.50. This box is attached to a string which extends in a straight line but then is attached to a wall 45 degrees above the horizontal. At the point where the string begins to rise a strand of string is attached which holds the second mass.