Question

Plz answer to this one 1⃣
Don't write options directly anotherwise reported​

Answer 1

The correct option is : 2) J/2m

Let v and v₀ be the velocity of CM after pure rolling and before pure rolling.

J = ΔP = mv₀

​Also we know,  v = Rω

Now, f = ma

⇒  a =  f/m

fR = I∝

fR = ( mR²) ∝

⇒ mRα = f  

v = v₀ − at

⇒ v = v₀ −  f/m x t  -----------(1)

ω = 0 + αt =  (f/mR)xt  ------------(2)

From (1) and (2) we get ,

 v = v₀− ωR

⇒ v = v₀− v

⇒ v = v₀/2

∴ v = J/2m

HOPE THIS HELPS YOU !!    : )