stability
DESCRIPTION
The slides deal with mechanicalTRANSCRIPT
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STABILITY
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Stability
The property of a body that causes it to return to its original position or state of motion as a result of the action of restoring forces once its equilibrium has been disturbed.
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Factors Affecting Stability1. Base of Support2. Location of The Center of Gravity3. Mass4. Line of Gravity
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Base of Support• The area in contact with the
supporting surface plus the intervening area
• Wider base of support means greater stability
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Location of Center of Gravity
• The point where the weight of the body is concentrated; the point where a body may be hung without rotating.
• Center of gravity must be as low as possible for greater stability.
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Mass
• The amount of matter in a body.• Greater mass means greater inertia.• Body must be heavy for greater
stability.
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Line of Gravity
• The vertical line passing through the center of gravity.
• Line of gravity must pass within the base of support for greater stability.
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Types of Mechanical Equilibrium(States of Equilibrium )
Any object that is not accelerating may be in one of three states of equilibrium:
• Stable• Unstable• Neutral
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Stable Equilibrium
• wide base of support• low center of gravity• heavy mass• line of gravity that passes within the base of support
Stable objects are characterized by:
The body returns to its original position once the disturbing force has been removed.
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Unstable Equilibrium
• narrow base of support• high center of gravity• light mass• line of gravity that passes outside the base of support
Unstable objects are characterized by:
When a disturbing force is applied, the body falls over and seeks a different position.
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Neutral Equilibrium
• circular and spherical bodies• a center of gravity that is neither lowered nor raised when
the object is toppled• bodies that roll on their sides
Neutral objects are characterized by:
When a disturbing force is applied, the body is displaced but its center of gravity remains in the same level.
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What’s my type?
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Stable, unstable, neutral?