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) .

Calculate the viscous force on a ball of radius Imm moving through a l

1.	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) .
Answer» Solution :`"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`