Saved Bookmarks
| 1. |
Two disks `A` and `B` are free to rotate about their respective vertical smooth axis passing through their centre as shown. `(R_(A) = 2R_(B), I_(A) = 16 I_(B))`. Disc is rotating about its axis with an angular velocity of `5 rad//sec`. The two disks are moved near to each other till they are in contac. What will be the angular velocity of the smaller disk when slipping between two stops ? A. `8 rad//s`B. `4 rad//s`C. `12 rad//s`D. `5 rad//s` |
|
Answer» Correct Answer - A Two disks ……… If impulse of friction till slipping is `I` then `-IR_(A) = I_(A)omega_(A) = I_(A)xx5` `+IR_(B) = I_(B)omega_(B) - 0` For no slipping `omega_(A)R_(A) = omega_(B)R_(B)` Solving this we get `omega_(B) = 8 rad//s` |
|