Find the center of mass $(x,y,z)$ of the following structure of four identical cubes if the length of each side of a cube is $1$ unit.
$(1/2,1/2,1/2)$
$(1/3,1/3,1/3)$
$(3/4,3/4,3/4)$
$(1/2,3/4,1/2)$
A stick has its bottom end attached to a wall by a pivot and is held up by a massless string attached to its other end. Which of the following scenarios has the smallest tension in the string ? (Length of stick is same in all scenarios)
Find the centre of mass of a triangular lamina.
A circular disc of radius $R$ is removed from a bigger uniform circular disc of radius $2R$ such that the circumferences of the discs coincide. The centre of mass of the new disc is $\alpha R$ from the centre of the bigger disc. The value of $\alpha$ is
$A$ man weighing $80\, kg$ is standing at the centre of a flat boat and he is $20\, m$ from the shore. He walks $8\, m$ on the boat towards the shore and then halts. The boat weight $200\, kg$. ........ $m$ far is he from the shore at the end of this time.
A uniform square wooden sheet of side $a$ has its centre of mass located at point $O$ as shown in the figure below on the left. A square portion of side $b$ of this sheet is cut out to produce an $L$-shaped sheet as shown in the figure on the right.The centre of mass of the L-shaped sheet lies at the point $P$ (in the above diagram), when