MCQOPTIONS
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MCQOPTIONS
This section includes 26 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering Mechanics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Find the ratio of potential energy if an object is raised to thrice of its height and its mass is tripled. |
| A. | 1:1 |
| B. | 1:4 |
| C. | 1:9 |
| D. | 1:3 |
| Answer» D. 1:3 | |
| 2. |
The potential energy of an object cannot be increased by internal forces. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 3. |
The potential energy of an object of constant mass and fixed reference is determined by its _____ |
| A. | mass |
| B. | gravitational acceleration |
| C. | position |
| D. | velocity |
| Answer» D. velocity | |
| 4. |
Consider 2 balls A and B of the same mass. The potential energy of ball A is thrice that of ball B. How high is ball A compared to ball B? |
| A. | Same height as ball B |
| B. | Twice as high height as ball B |
| C. | Thrice as high height as ball B |
| D. | Four times as high height as ball B |
| Answer» D. Four times as high height as ball B | |
| 5. |
Since the potential energy of an object depends on the acceleration due to gravity and since the acceleration due to gravity decreases as altitude increases, we can conclude that the potential energy of an object decreases as altitude increases. |
| A. | True |
| B. | False |
| Answer» C. | |
| 6. |
An object is thrown from the ground with a velocity of 5 m/s. If the object has a mass of 2kg, what will be its potential energy at the top-most point of its trajectory? (Assume g = 10 m/s2) |
| A. | 5 J |
| B. | 15 J |
| C. | 25 J |
| D. | 50 J |
| Answer» D. 50 J | |
| 7. |
A 10kg object is raised to a height of 20m. What is the magnitude of its potential energy? (Assume g = 10 m/s2) |
| A. | 500 J |
| B. | 1000 J |
| C. | 1500 J |
| D. | 2000 J |
| Answer» E. | |
| 8. |
An object of mass 5kg is taken from a height of 10 m to a height of 30 m. What is the increment in its potential energy? (Assume g = 10m/s2) |
| A. | 500 J |
| B. | 1000 J |
| C. | 1500 J |
| D. | 2000 J |
| Answer» C. 1500 J | |
| 9. |
The potential energy of an object maximises as its velocity increases. |
| A. | True |
| B. | False |
| Answer» C. | |
| 10. |
Virtual Work done is saved in the form of potential energy. It is best given by ___________ |
| A. | δU = Fδrcosθ |
| B. | δU = Fδrsinθ |
| C. | δU = Fδrcotθ |
| D. | δU = Fδrδθ |
| Answer» B. δU = Fδrsinθ | |
| 11. |
The net forces of acting on the body need to be zero. This is also applicable for the bodies having some potential energy. This means that the work done over it is saved in the form of potential energy. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 12. |
Free body diagrams doesn’t play any role in making the calculations on the conditions of the equilibrium of the body when there is the involvement of the potential energy. |
| A. | True |
| B. | False |
| Answer» C. | |
| 13. |
The coefficient of kinetic friction when a body is moving from a height above the ground level to a smaller height is ____________ than coefficient of static friction. |
| A. | Smaller |
| B. | Larger |
| C. | Significantly larger |
| D. | Highly larger |
| Answer» B. Larger | |
| 14. |
What is the value of θ in the figure given below? |
| A. | 69˚ |
| B. | 60˚ |
| C. | 55˚ |
| D. | 90˚View Answer |
| Answer» B. 60˚ | |
| 15. |
Which statement is correct about the vector F in the showing the gravitational nature of the forces? |
| A. | F= Fcos β + Fcos α + Fcosγ |
| B. | F= Fsin β + Fcos α + Fcosγ |
| C. | F= Fcos β + Fsin α + Fcosγ |
| D. | F= Fcos β + Fcos α + Fsinγ |
| Answer» B. F= Fsin β + Fcos α + Fcosγ | |
| 16. |
Determine the magnitude of the force F = 300j parallel to the direction of AB? |
| A. | 155N |
| B. | 257.1N |
| C. | 200N |
| D. | 175NView Answer |
| Answer» C. 200N | |
| 17. |
We use sometimes the measures to know the direction of moment in the calculations of the moments caused by the gravitational forces over the body above the ground level. Which one is right about it(consider the mentioned axis to be positive)? |
| A. | Thumb is z-axis, fingers curled from x-axis to y-axis |
| B. | Thumb is x-axis, fingers curled from z-axis to y-axis |
| C. | Thumb is y-axis, fingers curled from x-axis to z-axis |
| D. | Thumb is z-axis, fingers curled from y-axis to x-axis |
| E. | ?a) Thumb is z-axis, fingers curled from x-axis to y-axisb) Thumb is x-axis, fingers curled from z-axis to y-axisc) Thumb is y-axis, fingers curled from x-axis to z-axisd) Thumb is z-axis, fingers curled from y-axis to x-axis |
| Answer» B. Thumb is x-axis, fingers curled from z-axis to y-axis | |
| 18. |
WHICH_STATEMENT_IS_CORRECT_ABOUT_THE_VECTOR_F_IN_THE_SHOWING_THE_GRAVITATIONAL_NATURE_OF_THE_FORCES??$ |
| A. | F= Fcos β + Fcos α + Fcosγ |
| B. | F= Fsin β + Fcos α + Fcosγ |
| C. | F= Fcos β + Fsin α + Fcosγ |
| D. | F= Fcos β + Fcos α + Fsinγ |
| Answer» B. F= Fsin ‚âà√≠‚Äö√¢¬ß + Fcos ‚âà√≠¬¨¬± + Fcos‚âà√≠‚Äö√¢‚Ä¢ | |
| 19. |
Air also resist the body in the motion. The maximum value of the frictional force is called _________ |
| A. | Limiting Friction |
| B. | Non-Limiting Friction |
| C. | Limiting Action Friction |
| D. | Non-Limiting Action Friction |
| Answer» B. Non-Limiting Friction | |
| 20. |
69Àö$ |
| A. | 60Àö |
| B. | 55Àö |
| C. | 90Àö |
| Answer» B. 55‚àö√Ñ‚àö‚àÇ | |
| 21. |
155? |
| A. | 257.1N |
| B. | 200N |
| C. | 175N |
| Answer» B. 200N | |
| 22. |
We use sometimes the measures to know the direction of moment in the calculations of the moments caused by the gravitational forces over the body above the ground level. Which one is right about it(consider the mentioned axis to be positive)? |
| A. | Thumb is z-axis, fingers curled from x-axis to y-axis |
| B. | Thumb is x-axis, fingers curled from z-axis to y-axis |
| C. | Thumb is y-axis, fingers curled from x-axis to z-axis |
| D. | Thumb is z-axis, fingers curled from y-axis to x-axis |
| Answer» B. Thumb is x-axis, fingers curled from z-axis to y-axis | |
| 23. |
For equilibrium, the net moment acting on the body by various forces is zero, in any of the body in the space, as in the space it is acted by various forces, like gravity. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 24. |
For the conditions of the equilibrium of the body, i.e. the rigid body only the external forces defines the equilibrium. And the support reactions only cancels out the rotation part of the body and thus the potential energy of the body is stored in it. |
| A. | The first part of the statement is false and other part is true |
| B. | The first part of the statement is false and other part is false too |
| C. | The first part of the statement is true and other part is false |
| D. | The first part of the statement is true and other part is true too |
| Answer» D. The first part of the statement is true and other part is true too | |
| 25. |
Which of the following is correct for the forces which are considered in the potential energy calculations? |
| A. | The application of the conditions of the equilibrium of the body is valid only if the forces are collinear |
| B. | The application of the conditions of the equilibrium of the body is valid only if the forces are parallel |
| C. | The application of the conditions of the equilibrium of the body is valid only if the forces are perpendicular |
| D. | The application of the conditions of the equilibrium of the body is valid throughout |
| Answer» E. | |
| 26. |
Potential energy is stored in the body if some work is done on it. Work done is best given by: |
| A. | dU = Fdrcosθ |
| B. | dU = Fdrsinθ |
| C. | dU = Fdrcotθ |
| D. | dU = Fdrdθ |
| Answer» B. dU = Fdrsin‚âà√≠‚Äö√†√® | |