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Understanding Friction: Factors, Limits & Impacts

Explore the concepts of friction, factors influencing it, and its limits in this detailed guide. Discover the role of mass, materials, and contact area in friction, as well as the significance of limiting friction and coefficients.

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Understanding Friction: Factors, Limits & Impacts

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  1. Friction • Acts in direction of plane (i.e. up or down the table) • Factors affecting friction • Limiting friction Flim = R

  2. Factors Affecting Friction • Mass of object • Material of surface & object • Area of contact • Shape of contact • Other forces (& others…)

  3. Limiting Friction • The amount of force required to overcome friction • There is a limit to the amount of friction between an object and a surface • Friction, or limiting friction, is largely dependent on mass of object Flim = R Normal reaction force ( mg) Amount of force required to overcome friction 0 ≤  ≤ 1 Coefficient of friction (all the other factors)

  4. More on friction • Friction is in direction opposite to motion (it opposes the force) • At point of movement the friction is ‘limiting’ (and in direction opposite to motion) • At point of movement F = R • Friction is always ≤ R (in case above friction is equal to R)

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