Levers & Center of gravity & Stability
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| What is a lever? | show 🗑
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| show | Motive force and resistance force are on opposite side of the axis (F↓ ▲ R↓)
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| show | Motive force and resistance force are on the same side of the axis BUT resistance force closest to axis
( ▲ R↓ F↓)
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| Third class lever (most common) | show 🗑
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| The main advantage of 3rd class lever? | show 🗑
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| Law of the lever for long arm | show 🗑
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| show | the force must be large to achieve the same moment of rotation if the lever arm is short (short arm = more force)
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| show | high risk injury
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| Ligaments close to the center of the joint need what? | show 🗑
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| show | the point around which a body’s weight is
equally balanced or distributed in all directions
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| show | the point around which a body’s mass is
equally balanced or distributed in all directions
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| show | inside and outside the body
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| CG inside the body | show 🗑
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| CG outside of body | show 🗑
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| Why is the CG of interest in the study of human bio-mechanics | show 🗑
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| show | way above the center of gravity
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| CG↓ low as possible | show 🗑
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| show | the lower you reach
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| How might CG get even lower once you are in the air? | show 🗑
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| What does center of gravity obey? | show 🗑
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| Balance | show 🗑
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| show | Resistance to the distribution of equilibrium
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| show | size, base support, height of CG
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| Size | show 🗑
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| show | if line of the CG falls within the base of support, stability results
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| Height of CG | show 🗑
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| Base of support | show 🗑
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| What can increase a body's stability? | show 🗑
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