Start Free Mock LoginAlready registered? Login here

Physics - Fluid Question with Solution | TestHub

PhysicsFluidViscosityEasy2 minQB

PhysicsEasysingle choice

A sphere of mass $m$ and radius $r$ is projected in a gravity free space with speed $v$ . If the coefficient of viscosity of the medium in which it moves is $1 / 6 π Pa s$ , the distance travelled by the body before it stops is :

Options:

Answer:

Solution:

The only force acting on the body is the viscous force

Here, $m \frac{vdv}{dx} = - 6 π η rv = - rv$

$\Rightarrow \int_{v}^{0} mdv = \int_{0}^{x} - rdx \Rightarrow x = \frac{mv}{r}$

Stream:JEESubject:PhysicsTopic:FluidSubtopic:Viscosity

⏱ 2mℹ️ Source: QB

Doubts & Discussion

Loading discussions...