$v_o=$ speed at which mass breaks away $=80\mathrm{.}0c\frac{m}{s}$;$m_b=$ mass of the block $=18\mathrm{.}0m_a=$ added mass $=75\mathrm{.}0g$;$r_o=$ radius of the circular motion $=10\mathrm{.}0cm.$ The value that would result in the mass breaking away from the magnet is given by