Get 2 FREE Instant-Explanations on Filo with code FILOAPP

A flat plate of area 10cm^{2} is separated from a large plate

Question

A flat plate of area 10cm $^{2}$ is separated from a large plate by a layer of glycerine $1 mm$ thick.If the coefficient of viscosity of glycerine is 20 poise, the force required to keep the plate moving with a velocity of $1 c m$ per sec is :

80 dyne

200 dyne

800 dyne

2000 dyne

Views: 1,694 students

Found 8 tutors discussing this question

Amelia Discussed

A flat plate of area 10cm

^{2}

is separated from a large plate by a layer of glycerine

1 mm

thick.If the coefficient of viscosity of glycerine is 20 poise, the force required to keep the plate moving with a velocity of

1 c m

per sec is :

5 mins ago

Discuss this question LIVE

5 mins ago

Text solutionVerified

Force required =

η A \frac{d v}{d y}

Now,

\frac{d v}{d y} = \frac{10 \times 1 c m / s}{1 c m} = 10/ s

So, force to keep plate moving =

10 \times 10 \times 20

dyne =

2000

dyne

Was this solution helpful?

150

Report

One destination to cover all your homework and assignment needs

Learn Practice Revision Succeed

Instant 1:1 help, 24x7

60, 000+ Expert tutors

Textbook solutions

Big idea maths, McGraw-Hill Education etc

Essay review

Get expert feedback on your essay

Schedule classes

High dosage tutoring from Dedicated 3 experts

Trusted by 4 million+ students

Stuck on the question or explanation?

Connect with our physics tutors online and get step by step solution of this question.

231 students are taking LIVE classes

Question Text	A flat plate of area 10cm $^{2}$ is separated from a large plate by a layer of glycerine $1 mm$ thick.If the coefficient of viscosity of glycerine is 20 poise, the force required to keep the plate moving with a velocity of $1 c m$ per sec is :
Answer Type	Text solution:1
Upvotes	150