Latest KVPY Aptitude Question SOLUTION: Seven identical coins are rigidly arranged on a flat table in the pattern shown below so that each coin touches its
neighbors. Each coin is a thin disc of mass m and radius r. Note
Seven identical coins are rigidly arranged on a flat table in the pattern shown below so that each coin touches its
neighbors. Each coin is a thin disc of mass m and radius r. Note that the moment of inertia of an individual coin
about an axis passing through centre and perpendicular to the plane of the coin is mr2 / 2
The moment of inertia of the system of seven coins about an axis that passes through the point P (the centre of the
coin positioned directly to the right of the central coin) and perpendicular to the plane of the coins is–