Physics - Mechanical Properties of Solids Question with Solution | TestHub

For a massless rod of length l lies on a horizontal table and is pivoted at its midpoint. Balls 3m and m are fixed to its ends. A third ball 2m is tied to the m ball by a string of length l and is projected at speed v as shown; its perpendicular distance from the axle is 4l/5 when the string becomes taut.