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Frictional Forces: Advantages, Disadvantages & Applications

Discover the dynamics of static and kinetic frictional forces. Learn about the benefits and drawbacks of friction, including wear and tear and energy loss. Explore the microscopic perspective on frictional forces and their comparison to applied forces. Delve into static and kinetic frictional forces, coefficients of friction, and practical examples like sled riding and tension forces on inclined planes.

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Frictional Forces: Advantages, Disadvantages & Applications

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  1. 4.9 Static and Kinetic Frictional Forces There are situations where friction helps us and at other times it is a hindrance. Advantages of friction: Disadvantages of friction: wear and tear & energy loss.

  2. Microscopic view of Frictional Forces

  3. Frictional force VERSUS Applied force

  4. Frictional force VERSUS Applied force

  5. Static Frictional Force The magnitude fs of the static frictional force can have any value from zero up to a maximum value of fsMAX, depending on the applied force. fs≤fsMAX fsMAX = msFN

  6. Kinetic Frictional Force The magnitude fk of the kinetic frictional force is given by,

  7. Coefficients of Friction

  8. EXAMPLE 10 Sled Riding A sled is traveling at 4.00 m/s along a horizontal stretch of snow, as Figure 4.23a illustrates. The coefficient of kinetic friction is mk = 0.0500. How far does the sled go before stopping?

  9. 4.10 The Tension Force

  10. Object on an Inclined Plane

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