The ratio between the force necessary to move one surface horizontally over another and the pressure between the two surfaces.
- ‘The coefficient of friction and other aerodynamic aspects in aircraft are more important than simply miles per gallon.’
- ‘Such mills have large diameter rolls with surfaces that are roughened or ragged to increase the coefficient of friction.’
- ‘In fact, the thickness of the oil determines its coefficient of friction and defines four distinct regions of lubrication.’
- ‘It appears that this more subtle effect accounts for the low coefficient of friction of icy surfaces.’
- ‘Nylon gears and other moving parts have low coefficients of friction and excellent wear-resistance and impact and tensile strengths.’
We take a look at several popular, though confusing, punctuation marks.