Phy---about force

By replacing the string with a longer one does not solve the breaking problem. The ability of the string to resist the force by the mass of the picture is the sectional area of the string and its ultimate tensile strength which is defined in terms of the section area of the string under tension.


According to the above eplanation, Tom must only replace the string with a thicker one. That is a string with larger diameter, not a longer one.