Physics - Circular Motion Question with Solution | TestHub

A 3 kg block is attached to a vertical rod by two strings, each 5 m long, tied 8 m apart on the rod, so the block moves in a circle of radius 3 m . (a) How many revolutions per minute must the system make for the tension in the upper string to be 100 N? (b) What is the tension in the lower string then? (Take $\mathrm{g}=10\mathrm{m}/{\mathrm{s}}^2$)