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Calculate the viscous force on a ball of...

Calculate the viscous force on a ball of radius Imm moving through a liquid of viscosity `0.2 Nsm^(-2)` at a speed of `0.07 ms^(-1)` .

Text Solution

Verified by Experts

`"Radius of the ball" (a) = 1 mm =1 xx 10^(-3)m`
`"Co-effecient of viscosity of liquid" (eta)= 0.2 Nsm^(-2)`
`"Speed of the ball" (v)= 0.07 ms^(-1)`
According to Stoke.s law
`"Viscous force" F = 6pietaav`
`6 xx 3.14 xx 1 xx 10^(-3) xx 0.2 xx 0.07`
`=0.26376 xx 10^(-3) = 2.64 xx 10^(-4) N`
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