MCQOPTIONS
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MCQOPTIONS
This section includes 14 Mcqs, each offering curated multiple-choice questions to sharpen your Physics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
What is the value of spring constant if force of 200 N is acting on it and the spring is compressed by 2m? |
| A. | 100 kgs<sup>-2</sup> |
| B. | 100 kgs<sup>-1</sup> |
| C. | 100 kg<sup>2</sup>s<sup>2</sup> |
| D. | 100 Kgs |
| Answer» B. 100 kgs<sup>-1</sup> | |
| 2. |
A force F = x + 1 N acts on a particle in x direction. What is the work done from x = 2m to 5 m? |
| A. | 10.5 J |
| B. | 14.5 J |
| C. | 13.5 J |
| D. | 0.5 J |
| Answer» D. 0.5 J | |
| 3. |
Which of the following is not a variable force? |
| A. | F = x |
| B. | F = y<sup>2</sup> |
| C. | F = 2 |
| D. | F = 2*t |
| Answer» D. F = 2*t | |
| 4. |
A force of 600 N elongates a spring from its natural length of 18 cm to a length of 20 cm. What is the work done? |
| A. | 116J |
| B. | 114J |
| C. | 118J |
| D. | 120J |
| Answer» C. 118J | |
| 5. |
A spring is stretched by a length x, then the potential energy stored in it changes by 0.5*k*x2, where k is the spring constant. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 6. |
What is the SI unit of variable force? |
| A. | Newtons |
| B. | Joules |
| C. | Ampere |
| D. | Mole |
| Answer» B. Joules | |
| 7. |
An object of mass 1kg is subjected to a variable force in x-direction. The force function is F = x2 N. What is the work done in moving the object from x = 2 to 5? |
| A. | 40 |
| B. | 39 |
| C. | 38 |
| D. | 69 |
| Answer» C. 38 | |
| 8. |
The area under the force (F) versus displacement (x) graph gives work. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 9. |
A chain of length 4 m is kept on a table. 2 m of the chain hangs freely from the table s edge. The mass of the whole chain is 8 kg. What is the work done to pull the whole chain onto the table? (Assume g = 10m/s2) |
| A. | 20 J |
| B. | 40 J |
| C. | 60 J |
| D. | 80 J |
| Answer» C. 60 J | |
| 10. |
A person of mass 50 kg carrying a load of 20 kg walks up a staircase. The width and height of each step are 0.25 m and 0.2 m respectively. What is the work done by the man in walking 20 steps?(Assume g = 10m/s2) |
| A. | 800 J |
| B. | 1600 J |
| C. | 2000 J |
| D. | 2800 J |
| Answer» E. | |
| 11. |
A force F = (5i 3j +2k) N moves a particle from r1 = (2i + 7j + 4k) m to r2 = (5i + 2j + 8k) m. What is the work done by the force? |
| A. | 18 J |
| B. | 28 J |
| C. | 38 J |
| D. | 48 J |
| Answer» D. 48 J | |
| 12. |
A bucket filled with water weighing 20 kg is raised from a well of depth 20 m. If the linear density of the rope is 0.2 kg/m, the work done is _____ (Assume g = 10m/s2) |
| A. | 4000 J |
| B. | 4040 J |
| C. | 4400 J |
| D. | 4800 J |
| Answer» D. 4800 J | |
| 13. |
A rope has a uniform mass density of 0.4 kg/m. The rope is 10 m long and is lowered into a 10 m deep pit. The bottom part of the rope just touches the bottom of the pit. What is the work done to pull the rope out of the well completely? (Assume g = 10m/s2) |
| A. | 200 J |
| B. | 400 J |
| C. | 2000 J |
| D. | 4000 J |
| Answer» B. 400 J | |
| 14. |
The length of a smooth inclined plane of 30-degree inclination is 5 m. The work done in moving a 10 kg mass from the bottom of the inclined plane to the top is _____ Joules. (Assume g = 10m/s2) |
| A. | 250 |
| B. | 1000 |
| C. | 1250 |
| D. | 500 |
| Answer» B. 1000 | |