Question

(A)
A ring of mass m is projected on rough horizontal plane with velocity vo
The magnitude of work done by frictional force to start rolling
​

Answer 1

We know that the relation between acceleration force and mass is.

$a = \frac{f}{m}$

also,

$v = u + at$

$u = 0$

$v = \frac{f}{m} t$

$f = \frac{mv}{t}$

this is the frictional force that will act on the object to start rolling

#SPJ3