Physics Chapter on Friction

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Questions and Answers

What is the primary force that opposes the motion of a skateboard after it's pushed and released?

  • Acceleration
  • Friction (correct)
  • Gravity
  • Inertia

Static friction is typically greater than kinetic friction.

True (A)

What is the equation that relates the friction force to the normal force?

F = μ * W

Friction depends on two factors: the type of surfaces and the force pressing the surfaces together, known as the ______.

<p>normal force</p> Signup and view all the answers

Match the type of friction with its description:

<p>Static friction = Resists the initiation of motion Kinetic friction = Resists the motion of sliding surfaces Normal force = Force pressing surfaces together Friction coefficient = Denotes the type of surface material</p> Signup and view all the answers

What happens to a skateboard after you push it and release it?

<p>It slows down and eventually stops. (C)</p> Signup and view all the answers

Static friction is generally less than kinetic friction.

<p>False (B)</p> Signup and view all the answers

What is the primary factor that affects the magnitude of friction between two surfaces?

<p>The type of surfaces and the force pressing them together.</p> Signup and view all the answers

The friction coefficient is denoted by the letter ______.

<p>μ</p> Signup and view all the answers

Match the type of friction with its corresponding function:

<p>Static friction = Resists the initiation of motion Kinetic friction = Resists the motion of sliding surfaces Friction coefficient = Denotes the type of surfaces' interaction</p> Signup and view all the answers

Flashcards

Friction

A force that opposes the sliding motion of two surfaces in contact.

Static Friction

It is the force that resists the initiation of motion between two surfaces in contact.

Kinetic Friction

It is the force that resists the motion of two surfaces sliding past each other.

Friction Coefficient (μ)

The resistance to motion between surfaces in contact.

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Normal Force (W)

The force pressing two surfaces together, which determines the strength of friction between them.

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Friction Force (F)

The larger the friction coefficient, the greater the friction force.

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