Friction engineers have a complex relationship with friction, as it consistently opposes motion and ultimately leads to it stopping. Friction is defined as the force resisting the movement between two contacting surfaces, and its main types include static friction, which prevents sliding between surfaces, and sliding friction, which acts against the motion of a moving surface. Despite its negative effects, understanding friction is crucial in engineering applications.

1. 5. FRICTION
Engineers in particular have a real
"love-hate" relationship with friction.
Like the tortoise in the famous story, friction always
"wins," eating away at energy you put into motion,
slow and steady. Sooner or later, friction will cause
the motion to stop. Ultimately, friction wins!

2. Definition
Force that resists the movement of
two contacting surfaces that slide
relative to one another
Acts tangent to the surfaces at points
of contact with other body
Opposing possible or existing motion
of the body relative to points of
contact

4. Types of friction
Static Friction –The frictional
force that prevents two surfaces in
contact from sliding past each
other.
Sliding Friction –The force that
acts in the opposite direction to the
motion of a surface sliding on
another surface.

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23. Example

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31. Thank You