Lecture 6 - Department of Physics PHY 2048 Chapter 6.1...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Department of Physics PHY 2048 Chapter 6.1 Force & Motion: Friction N s s F f μ = max Mg F f F s N s s ext μ μ = = = max max • Coefficient of static friction μ s : Case 1: v = 0 & a = 0 Block f s Table F N F g F ext M • Coefficient of kinetic friction μ k : If on object does not move ( i.e. v = 0 a = 0) then the static frictional force, f s , and the component of the external force F ext that is parallel to the surface balance each other and the maximum value of the magnitude of f s is given by If the object begins to slide along the surface ( i.e. v ≠ 0) then the magnitude of the frictional force, rapidly decreases to a value f k , where N k k F f μ = Case 2: v not 0 Block f Table F N F g F ext M v ) ( g a M F k ext μ + = and and Maximum external force without the block sliding! Note that μ k < μ s . Department of Physics PHY 2048 Chapter 6.2 Friction: Examples F ext Fig. 2 M θ s μ θ = tan • Example (static friction): • Example (kinetic friction): (Fig. 2) A block of mass M slides along the floor while (Fig....
View Full Document

Page1 / 4

Lecture 6 - Department of Physics PHY 2048 Chapter 6.1...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online