Question

An object of mass moves round a circle of radius 6 m if the if the period of motion is π calculate the force towards the centre

Answer 1

Assume that $m=5\ kg$ . So, we have

$F=mv^2/r=m\omega^2r=m(\frac{2\pi}{T})^2r=m(\frac{2\pi}{\pi})^2r=$

$=4mr=4\cdot5\cdot6=120\ (N)$ . Answer