MCQOPTIONS
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MCQOPTIONS
This section includes 21 Mcqs, each offering curated multiple-choice questions to sharpen your Physics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
If mass (m) is doubled and velocity (v) is halved then _____ |
| A. | Kinetic energy decreases by half |
| B. | Potential decreases by half |
| C. | Momentum decreases by half |
| D. | Potential and kinetic energy remains unchanged |
| Answer» B. Potential decreases by half | |
| 2. |
Which of the following cannot be called energy? |
| A. | Momentum |
| B. | Stress energy |
| C. | Chemical potential |
| D. | Strain energy |
| Answer» B. Stress energy | |
| 3. |
For the given diagram, choose the correct statement. Consider frictional forces absent. |
| A. | Kinetic energy is being permanently lost |
| B. | There is no energy loss |
| C. | Initially, the particle has maximum potential energy |
| D. | Potential energy is being permanently gained |
| Answer» C. Initially, the particle has maximum potential energy | |
| 4. |
If a solid sphere of mass 200g and radius 20cm is rotating with an angular velocity of 5 rad s-1, its rotational kinetic energy is _____ |
| A. | 0.06J |
| B. | 0.04J |
| C. | 0.03J |
| D. | 0.004J |
| Answer» C. 0.03J | |
| 5. |
A particle of mass 200g is thrown vertically upwards with a speed of 10ms-1, the work done by force of gravity while the particle goes up is given by _____ |
| A. | 0.5J |
| B. | 5J |
| C. | 10J |
| D. | 15J |
| Answer» D. 15J | |
| 6. |
An external force is acting on a system, the work done on the system is change in its kinetic energy. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 7. |
What work must be done to stop a bullet moving with a velocity of 2000ms-1 and having a mass of 50g? |
| A. | 105J |
| B. | 106J |
| C. | 104J |
| D. | 107J |
| Answer» B. 106J | |
| 8. |
A pendulum of mass 2kg is given an energy of 200J then the maximum height it will reach is _____ |
| A. | 25m |
| B. | 20m |
| C. | 15m |
| D. | 10m |
| Answer» E. | |
| 9. |
At the highest point of a projectile’s trajectory, the kinetic energy is minimum and potential energy is maximum. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 10. |
A particle of mass 1kg is moving with a velocity of 20ms-1 then its kinetic energy is ____ |
| A. | 200 J |
| B. | 200 kgm2s-1 |
| C. | 200 kgm-1s-2 |
| D. | 200 kgm-1s-1 |
| Answer» B. 200 kgm2s-1 | |
| 11. |
A body is falling freely from rest from a height of 100m. The ratio of kinetic energy after 2 and 5 seconds is _____ |
| A. | 2:5 |
| B. | 4:25 |
| C. | 25:4 |
| D. | 5:2 |
| Answer» C. 25:4 | |
| 12. |
A body is projected up vertically with a velocity of 60 m/s. What percentage of its initial kinetic energy is converted into potential energy after 3 seconds? (Take g = 10 m/s2) |
| A. | 25 % |
| B. | 50% |
| C. | 75% |
| D. | 100% |
| Answer» D. 100% | |
| 13. |
For an object of 1kg mass to escape the gravitational force of the earth, the kinetic energy imparted to it from the surface of the earth is approximately _____ |
| A. | 5600 J |
| B. | 10200 J |
| C. | 11200 J |
| D. | 12000 J |
| Answer» B. 10200 J | |
| 14. |
What kinetic energy should be imparted to an object of mass “m” to raise it to a height of 1000 meters? (Take g = 10 m/s2) |
| A. | 10m J |
| B. | 100m J |
| C. | 1000m J |
| D. | 10000m J |
| Answer» E. | |
| 15. |
The kinetic energy of a man is half that of a boy whose mass is half that of the man. When the man speeds up by 5 m/s, his kinetic energy doubles that of the boy’s kinetic energy. What is the initial velocity of the man? |
| A. | 5 m/s |
| B. | 10 m/s |
| C. | 15 m/s |
| D. | 20 m/s |
| Answer» B. 10 m/s | |
| 16. |
A person whose mass is 90kg is standing on a smooth horizontal platform. He throws a rock of mass 10kg horizontally on the same surface. If the distance between the person and the rock after 10 seconds is 10 m, what is the kinetic energy of the person? |
| A. | 0.45 J |
| B. | 4.5 J |
| C. | 0.9 J |
| D. | 0 J |
| Answer» C. 0.9 J | |
| 17. |
The momentum of a system can be changed without changing its kinetic energy. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 18. |
The kinetic energy of a body is ‘K’. If one-fourth of its mass is removed and velocity is doubled, the new kinetic energy will be _____ |
| A. | K |
| B. | 3K |
| C. | 4K |
| D. | 9K/4 |
| Answer» C. 4K | |
| 19. |
Two identical balls of mass “m” are released from rest from a height “h” on two ramps of different inclinations as shown in the figure. Which of the following is true for this scenario? Assume all surfaces to be smooth. |
| A. | Both A and B reach the bottom at the same time |
| B. | A reaches the bottom before B |
| C. | A reaches the bottom before B |
| D. | Depends on the angles a and a’ |
| Answer» B. A reaches the bottom before B | |
| 20. |
When a body is falling freely under the influence of gravity, the kinetic energy remains constant. |
| A. | True |
| B. | False |
| Answer» C. | |
| 21. |
For an object of mass “m” in motion, its kinetic energy depends on the modulus of its acceleration vector. |
| A. | True |
| B. | False |
| Answer» C. | |