A circular disc of radius r$-30$cm and weight W$=145$N is free to rotate about its geometric axis. A flexible cord carrying a weight of Q$=45$N$,$ is wound around the circumference of the disc . If the weight Q is released from rest find:

 $($a$)$ the time t required for it to fall through the height h:$300$cm $$

$($b$)$ with what velocity v will it strike the floor? 

Answer rating: 100% (QA)

This Physics problem is a classic problem of rotational motion involving the concept of torque and angular acceleration Lets first lay out the given i... View the full answer