MCQOPTIONS
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MCQOPTIONS
This section includes 4 Mcqs, each offering curated multiple-choice questions to sharpen your Machine Kinematics Questions and Answers knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
A wooden block is kept on a polished wooden plank and the inclination of the plank is gradually increased. It is found that the block starts slipping when the plank makes an angle of 18° with the horizontal. However, once started the block can continue with uniform speed if the inclination is reduced to 15°. Find the coefficient of kinetic friction between the block and the plank. |
| A. | tan 180 |
| B. | tan 150 |
| C. | tan 330 |
| D. | tan 30 |
| Answer» C. tan 330 | |
| 2. |
A wooden block is kept on a polished wooden plank and the inclination of the plank is gradually increased. It is found that the block starts slipping when the plank makes an angle of 18° with the horizontal. However, once started the block can continue with uniform speed if the inclination is reduced to 15°. Find the coefficient of static friction between the block and the plank. |
| A. | tan 180 |
| B. | tan 150 |
| C. | tan 330 |
| D. | tan 30 |
| Answer» B. tan 150 | |
| 3. |
The magnitude of the limiting friction (F ) bears a constant ratio to the normal reaction (RN) between the two surfaces. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 4. |
The magnitude of the force of friction is ____________ to the force, which tends the body to move. |
| A. | equal |
| B. | different |
| C. | both of the mentioned |
| D. | none of the mentioned |
| Answer» B. different | |