Physics 5 - Moments

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  • Created by: Ls
  • Created on: 18-05-14 13:29
moment
the turning effect of a force
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funding the size of a moment
moment (Nm) = force (N) x perpendicular distance from the line of action
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centre of mass
the point where the whole mass of the object appears to act
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centre of gravity
pulls down on every molecule of an object, meaning it will have a weight, this weight seems to act on its centre
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suspended object
it will swing until its centre of gravity is directly below the point of suspension
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centre of gravity of a symmetrical shape
along the line(s) of symmetry
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equilibrium
anti-clockwise moment = clockwise moment
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forces acting on a beam
The upward forces on a light beam, supported at its ends, vary with the position of a heavy object placed on the beam. upward forces = downward force
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stabiblity
If total AC moments ≠ C moments = a resultant moment and objects will turn. If the vertical line from the centre of gravity of an object is outside its base, it will topple; objects with a low centre of gravity and a wide base are most stable.
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Other cards in this set

Card 2

Front

moment (Nm) = force (N) x perpendicular distance from the line of action

Back

funding the size of a moment

Card 3

Front

the point where the whole mass of the object appears to act

Back

Preview of the back of card 3

Card 4

Front

pulls down on every molecule of an object, meaning it will have a weight, this weight seems to act on its centre

Back

Preview of the back of card 4

Card 5

Front

it will swing until its centre of gravity is directly below the point of suspension

Back

Preview of the back of card 5
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