Forces No Further a Mystery
The drive which opposes the relative movement amongst the surfaces of two objects in contact and acts along the surfaces known as the drive of friction.
file = d p d t = d ( m v ) d t , \displaystyle \mathbf F = \frac \mathrm d \mathbf p \mathrm d t = \frac \mathrm d \left(m\mathbf v \correct) \mat