# physics

posted by
**M.sani**
.

A spherical mass 'm'is dropped vertically off a building starting from rest and 'y=0'.the mass experience a resistive force 'FR=-bv'.let 'r=b/m'.find the position'y(t)'of mass???

posted by
**M.sani**
.

A spherical mass 'm'is dropped vertically off a building starting from rest and 'y=0'.the mass experience a resistive force 'FR=-bv'.let 'r=b/m'.find the position'y(t)'of mass???