Answer-

a.  I have learnt -Definition of friction, importance & problem of friction, Minimization method of friction ,Amontons Law & static capstan method,Math.

b. Yes, I want to learn more.

c. Yes, I have  understood the course.

d. Importance of friction in Textile Industry
v Friction helps in drafting and drawing process. v Uniform tension can be maintained in winding and warping because of friction. v Friction helps in twisting during spinning. v Friction makes more clean yarn.