Question

factors (1) surface area (2) Normal froce(3) nature of surface. on which of the above factor that friction depends? A.(i)and (iii) B.i and ii
C.i,ii,iii
D.ii and iii

Answer 1

I think its D as surface might not affect friction and surely the other two does.

Answer 2

I think its nature of surface and normal force as if the object is heavy it requires more force and more friction will be created.