Normal Reaction & Friction (Leaving Cert Applied Maths): Flashcards

Force transmitted between objects by direct contact

Upward force preventing object from sinking into surface

Force opposing motion between bodies in sliding contact

Opposite to direction of movement

Measures strength of friction between two surfaces

$F = \mu R$

Surface materials and roughness

No, size and shape do not affect $\mu$

$R = Mg$

Maximum friction force possible between two surfaces

Object will start to move

Object remains stationary

Applied force - Friction force