A uniform circular disc with the hole lies over a smooth horizontal surface, C is centre of the disc and A is a point on the rim of the disc as shown. As the temperature is increased.
Know your College Admission Chances Based on your Rank/Percentile, Category and Home State.
Get your JEE Main Personalised Report with Top Predicted Colleges in JoSA
When temperature increases, the disc expands uniformly. Since the hole is symmetric about the center C, the expansion occurs equally in all directions from C. On a smooth horizontal surface with no external forces, the center of mass remains stationary due to conservation of momentum. Thus, point C (the center) stays at rest.
Point A, on the rim, moves radially outward due to thermal expansion. Since the disc is uniform and symmetric, this outward movement has a horizontal component to the right (as shown in the diagram), causing point A to move to the right.
Final answer: C remains at rest & A to right