Moments Flashcards

1
Q

What is a moment?

A
  • The roational / turning effect of a force around a pivot
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2
Q

Equation to find a moment?

A
  • Moment (Nm) = force (N) X distance (m)
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3
Q

What is important when measuring the moment of a force?

A
  • The distance must be the perpendicular distance form the pivot
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4
Q

How to we describe a moment?

A
  • Magnititude in Nm
  • Direction in clockwise or anti-clockwise
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5
Q

What is the principle of moments?

A
  • If an object is balanced, the total anticlockwise moment is equal to the total clockwise moment on the object
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6
Q

What is the job of a lever?

A
  • Increase the size of a force acting on an object, making it easier to move
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7
Q

What is the job of a gear?

A
  • Multiply the effect of a turning motion using moments
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8
Q

How do we find by how much the moment is increased in gears?

A
  • The amount of times the radius of gear B is greater than gear A is the amount of times by which the moment will be increased
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9
Q

Characteristics of gears

A
  • Adjacent gears always move in opposite directions
  • Total work done between both gears remains the same, only the moment is increased
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