Saved Bookmarks
| 1. |
A sphere of mass m and radius r is projected in a gravity free space with speed v. If coefficient of viscosity of the medium in which it moves is `1/(6pi)` , the distance travelled by the body before it stops isA. `(mv)/(2r)`B. `(2mv)/r`C. `(mv)/r`D. None of these |
|
Answer» The only force acting on the body is the viscous force Here `m(vdv)/(dx)=-6 pi eta rv =-rv` `rArr int_(v)^(0) mdv=int_(0)^(x)-rdx rArr x=(mv)/r` |
|