List of top Physics Questions on Work done in Thermodynamics asked in AP EAMCET

A block of mass $m$ is placed in equilibrium on a moving horizontal plank. The maximum horizontal acceleration of the plank for $\mu = 0.2$ is (Acceleration due to gravity = $10 \, {ms}^{-2}$).

A spring of spring constant $ 200 \, {N/m} $ is initially stretched by $ 10 $ cm from the unstretched position. The work to be done to stretch the spring further by another $ 10 $ cm is:

A body of mass $2 \, {kg}$ is placed on a smooth horizontal surface. Two forces $F_1 = 20 \, {N}$ and $F_2 = 10\sqrt{3} \, {N}$ are acting on the body in the directions making angles of $30^\circ$ and $60^\circ$ to the surface. The reaction of the surface on the body is:

Freezing compartment of a refrigerator is at $0^{\circ} C$ and room temperature is $27.3^{\circ} C$. Work done by the refrigerator to freeze $1\, g$ of water at $0^{\circ} C$ is $\left(L_{ ice }=80\, cal\, g ^{-1}\right)$