Question

Newton's Laws of Motion & Friction
A sphere of mass 'm', radius 'R' placed between two vertical walls having separation 'd' which is slightly
greater than 2R' :
d
wall
wall
Surface
(i) Calculate force exerted by walls on the sphere.
(ii) Calculate force exerted by ground surface on the sphere.
The 50 kg​

Answer 1

Answer:

A metal sphere of radius 1 mm and mass 50 mg falls vertically in glycerine. Find

(a) the viscous force exerted by the glycerine on the sphere when the speed of the sphere is 1 cm/s,

(b) the hydrostatic force exerted by the glycerine on the sphere and

(c) the terminal velocity with which the sphere will move down without acceleration.

Density of glycerine = 1260 kg/m

and it's coefficient of viscosity at room temperature = 8.0 poise