A block hangs from a string wrapped on a disc of radius 20 cm free to rotate about its axis which is fixed in a horizontal position. If the angular speed of the disc is 10 rad/s at some instant, with what speed is the block going down at that instant?

Question

Philoid · Accepted Answer

Given data-

Radius of the disc, r = 20 cm or 0.20 m

Angular speed of the disc ω = 10 rad/s

We know the relation between angular speed and linear speed

given by-

Now we if block is going down at instant the velocity of the block is

given by