MCQOPTIONS
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MCQOPTIONS
This section includes 5 Mcqs, each offering curated multiple-choice questions to sharpen your Physics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
There are two external forces acting on a system of particles. Select the correct statement. |
| A. | Linear momentum is necessarily not conserved |
| B. | Linear momentum may be conserved |
| C. | Linear momentum is zero |
| D. | Centre of mass will move with increasing speed |
| Answer» C. Linear momentum is zero | |
| 2. |
A radioactive particle at rest, having mass 10g, breaks into 2 fragments (1&2) in the mass ratio 2:3 respectively. If the first one moves with a velocity of 10m/s what will be the speed of the second particle? |
| A. | 4.33 m/s |
| B. | -4.33 m/s |
| C. | -6.67 m/s |
| D. | 6.67 m/s |
| Answer» D. 6.67 m/s | |
| 3. |
On collision of two balls linear momentum is conserved, it implies that even kinetic energy will remain conserved. True or False? |
| A. | True |
| B. | False |
| Answer» C. | |
| 4. |
A ball of mass 2kg is moving with a speed of 10m/s along a flat surface. It collides with another ball of mass 3kg and comes to rest, what will be the speed of the second ball after collision? |
| A. | The above said situation is not possible |
| B. | 20m/s |
| C. | Zero |
| D. | 6.67m/s |
| Answer» B. 20m/s | |
| 5. |
Which of the following is the mathematical representation of law of conservation of total linear momentum? |
| A. | d<b>P</b>/dt = 0 |
| B. | d<b>F</b>/dt = 0 |
| C. | d<b>P</b>/dt = <b>F</b><sub>internal</sub> |
| D. | d<b>F</b>/dt =<b> P</b> |
| Answer» B. d<b>F</b>/dt = 0 | |