Answer to Question #250470 in Physics for Tithi

Question

A small spherical steel ball of radius
a of a material of density à ƒ ƒ ƒ   falls from rest in still air of viscosity à ƒ ƒ ƒ Ž ·. Now (i) Write up
the equation of motion of the ball, (ii) Estimate its terminal velocity, and (iii) Find out
the time and distance traversed when the ball has acquired 90% of the terminal
velocity.

Answer 1

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