MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 4 Mcqs, each offering curated multiple-choice questions to sharpen your Physics Questions and Answers knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
A uniform free rectangular steel plate is heated from 273 to 373 kelvin. The initial area of the plate is 15 sq. cm. What is the shift of the centre of mass? |
| A. | a)0 cm |
| B. | 1 cm |
| C. | 2 cm |
| D. | 3 cm |
| Answer» B. 1 cm | |
| 2. |
Two particles A and B, initially at rest, start moving towards each other under a mutual force of attraction. When the speed of A is “10 m/s” and the speed of B is “800 m/s”, what is the speed of their centre of mass? |
| A. | 0 |
| B. | 0.8v |
| C. | 80v |
| D. | 8v |
| Answer» B. 0.8v | |
| 3. |
A system consists of 2 particles of the same mass. Let one particle be at rest and another particle have an acceleration of “2a”. What would be the acceleration of the centre of mass of the system? |
| A. | a/4 |
| B. | a/2 |
| C. | a |
| D. | 2a |
| Answer» D. 2a | |
| 4. |
Numerous particles in a system are placed at a distance of “D” from the origin. The position of the centre of mass will definitely be _____ |
| A. | Equal to D |
| B. | Lesser than or equal to D |
| C. | Greater than D |
| D. | Greater than or equal to D |
| Answer» C. Greater than D | |