Consider a small water drop in air. If T is the surface tension, then what is the force due to surface tension acting on the smaller section A B C ?

Question

Consider a small water drop in air. If T is the surface tension, then what is the force due to surface tension acting on the smaller section A B C ? (A) 2 T R π (B) 2 π T R sin θ (C) 2 π TR sin 2 θ (D) 2 π T R sin 3 θ

Tardigrade Admin · Accepted Answer

r = R sin θ Required force =[2 π r] T sin θ =2 π R sin 2 θ T

Q. Consider a small water drop in air. If $T$ is the surface tension, then what is the force due to surface tension acting on the smaller section $A BC$ ?

$2 TR π$

$2 π TR sin θ$

$2 π TR sin^{2} θ$

$2 π TR sin^{3} θ$

$r = R sin θ$
Required force $= [2 π r] T sin θ$
$= 2 π R sin^{2} θT$

Q. Consider a small water drop in air. If T is the surface tension, then what is the force due to surface tension acting on the smaller section ABC ?

2TRπ

2πTRsinθ

2πTRsin2θ

2πTRsin3θ