McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Uncategorized topics .
Chapters
| 1. |
Speed of Earth when a rock of mass 60 kg falling towards Earth with speed of 20 m s-1 is {{}} |
| A. | 2.4 × 10-22 m s-1 |
| B. | 3.5 × 10-33 m s-1 |
| C. | −2.0 × 10-22 m s-1 |
| D. | −3 × 1034 m s-1 |
| Answer» C. −2.0 × 10-22 m s-1 | |
| 2. |
Force exerted by bat on ball if it strikes a ball of mass 0.16 kg initially hits bat with speed of 25 m s-1 with time impact of 0.003 s is {{}} |
| A. | 145 N |
| B. | 1333.33 N |
| C. | 1456.7 N |
| D. | 6543 N |
| Answer» B. 1333.33 N | |
| 3. |
Momentum of electron having mass 9.1 × 10 -31 kg and velocity 2.0 ×107 is {{}} |
| A. | 1.91 × 10-23 |
| B. | 2.34 × 10-23 |
| C. | 3.11 × 10-19 |
| D. | 7.88 × 10-34 |
| Answer» A. 1.91 × 10-23 | |
| 4. |
To replace a ball with another ball by collision, a snooker player must consider the condition that |
| A. | the collision must be head on |
| B. | The moving ball must not be given any spin |
| C. | both A and B |
| D. | no conditions required |
| Answer» C. both A and B | |
| 5. |
Direction of momentum is direction of object's |
| A. | mass |
| B. | acceleration |
| C. | velocity |
| D. | frictional force |
| Answer» C. velocity | |
| 6. |
In a springy collision, if the fast moving trolley collides with a slow one, then the fast one will bounce back at speed of |
| A. | slow one |
| B. | less than slow one |
| C. | more than slow one |
| D. | with the same speed as before |
| Answer» A. slow one | |
| 7. |
An object travelling with constant velocity has |
| A. | constant momentum |
| B. | zero momentum |
| C. | increasing momentum |
| D. | decreasing momentum |
| Answer» A. constant momentum | |
| 8. |
If a trolley collides with a stationary trolley of double mass, then they move off with |
| A. | half of the original velocity |
| B. | one third of original velocity |
| C. | double the original velocity |
| D. | triple the original velocity |
| Answer» B. one third of original velocity | |
| 9. |
In a perfectly elastic collision, momentum and energy are |
| A. | not conserved |
| B. | conserved |
| C. | becomes zero after collision |
| D. | equal before collision |
| Answer» B. conserved | |
| 10. |
Mass and velocity are combined to give |
| A. | angular momentum |
| B. | equilibrium |
| C. | acceleration |
| D. | linear momentum |
| Answer» D. linear momentum | |
| 11. |
If the total kinetic energy and momentum of a system becomes zero after collision, then the collision is |
| A. | elastic |
| B. | inelastic |
| C. | conserved |
| D. | not conserved |
| Answer» B. inelastic | |
| 12. |
Momentum of two objects moving with same speed but in opposite direction upon collision is |
| A. | increased |
| B. | decreased |
| C. | is zero |
| D. | is infinite |
| Answer» C. is zero | |
| 13. |
Forces on interacting bodies are |
| A. | equal |
| B. | opposite |
| C. | both A and B |
| D. | parallel |
| Answer» C. both A and B | |
| 14. |
Resultant force acting on object and rate of change of linear momentum are |
| A. | inversely related |
| B. | not related at all |
| C. | directly related |
| D. | directly proportional |
| Answer» C. directly related | |
| 15. |
In a perfectly elastic collision, the relative speed of approach and relative speed of separation are |
| A. | equal |
| B. | in equal |
| C. | zero |
| D. | infinite |
| Answer» A. equal | |
| 16. |
{{}} A white ball of mass 1.0 kg moving with initial speed u = 0.5 m s -1 collides with stationary red ball of same mass, they move forward making angle of 90° between their paths. Their speed is |
| A. | 1 m s -1 |
| B. | 0.354 m s -1 |
| C. | 2 m s -1 |
| D. | 3 m s -1 |
| Answer» B. 0.354 m s -1 | |
| 17. |
In fireworks the momentum provided by chemicals is directed |
| A. | upwards |
| B. | left side |
| C. | right side |
| D. | downwards |
| Answer» D. downwards | |
| 18. |
Total momentum within a closed system is |
| A. | increasing |
| B. | decreasing |
| C. | zero |
| D. | constant |
| Answer» D. constant | |
| 19. |
Average force acting on 900 kg car if it's velocity ranges from 5 m s -1 to 30 m s -1 in 12 s is {{}} |
| A. | 1875 N |
| B. | 2000 N |
| C. | 3000 N |
| D. | 1560 N |
| Answer» A. 1875 N | |
| 20. |
Interaction that causes an object's momentum to change is |
| A. | velocity |
| B. | acceleration |
| C. | power |
| D. | force |
| Answer» D. force | |
| 21. |
Momentum possessed by spinning objects is called |
| A. | linear momentum |
| B. | angular momentum |
| C. | normal momentum |
| D. | degrees' momentum |
| Answer» B. angular momentum | |
| 22. |
In a perfectly inelastic collision, kinetic energy |
| A. | totally disappears |
| B. | is increased |
| C. | is decreased |
| D. | is unchanged |
| Answer» A. totally disappears | |
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