MCQOPTIONS
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MCQOPTIONS
This section includes 6 Mcqs, each offering curated multiple-choice questions to sharpen your Machine Kinematics 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 static friction between the block and the plank. |
| A. | tan 18<sup>0</sup> |
| B. | tan 15<sup>0</sup> |
| C. | tan 33<sup>0</sup> |
| D. | tan 3<sup>0</sup> |
| Answer» B. tan 15<sup>0</sup> | |
| 2. |
A boy (30 kg) sitting on his horse whips it. The horse speeds up at an average acceleration of 2.0 m/s 2.If the boy slides back during the acceleration, what can be said about the coefficient of static friction between the horse and the boy. |
| A. | 0.10 |
| B. | 0.20 |
| C. | 0.30 |
| D. | 0.40 |
| Answer» C. 0.30 | |
| 3. |
A boy (30 kg) sitting on his horse whips it. The horse speeds up at an average acceleration of 2.0 m/s 2.If the boy does not slide back, what is the force of friction exerted by the horse on the boy ? |
| A. | 20 N |
| B. | 30 N |
| C. | 40 N |
| D. | 60 N |
| Answer» E. | |
| 4. |
A heavy box of mass 20 kg is pulled on a horizontal surface by applying a horizontal force. If the coefficient of kinetic friction between the box and the horizontal surface is 0.25, find the force of friction exerted by the horizontal surface on the box. |
| A. | 29 N |
| B. | 39 N |
| C. | 49 N |
| D. | 59 N |
| Answer» D. 59 N | |
| 5. |
A body of mass 400 g slides on a rough horizontal surface. If the frictional force is 3.0 N, find the magnitude of the contact force. |
| A. | 5 N |
| B. | 10 N |
| C. | 15 N |
| D. | 20 N |
| Answer» B. 10 N | |
| 6. |
A body of mass 400 g slides on a rough horizontal surface. If the frictional force is 3.0 N, find the angle made by the contact force on the body with the vertical. |
| A. | 35<sup>0</sup> |
| B. | 36<sup>0</sup> |
| C. | 37<sup>0</sup> |
| D. | 38<sup>0</sup> |
| Answer» D. 38<sup>0</sup> | |