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GCSE
Physics paper 2
How moments work - spanner’s + seesaws
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Created by
Mabli Collyer
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Cards (20)
What is the main topic of today's video?
Moments
and their applications
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How does a longer spanner affect its use?
It is easier to use than a
short
spanner
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What is a moment?
The
rotational
effect of a force
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What happens when a force is applied downwards at the end of a spanner?
It turns around the
pivot point
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What do we call the central point of a spanner's rotation?
Pivot
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How is the size of a moment calculated?
Moment =
Force
×
Perpendicular
distance
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Why is the perpendicular distance important in calculating moments?
It
maximizes
the
moment's
effectiveness
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What is the perpendicular distance in the spanner example?
The
length
of the spanner
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What happens if force is applied at an angle?
The
perpendicular
distance
decreases
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If an 80 newton force is applied 20 centimeters from the pivot, what is the moment generated?
16
newton meters
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How do you convert 20 centimeters to meters?
0.2
meters
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What force is needed to generate a moment of 16 newton meters at 0.1 meters from the pivot?
160
newtons
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Why is a larger force needed when applied closer to the pivot?
To achieve the same
turning effect
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What is the pivot in a seesaw scenario?
The
middle
point
of the seesaw
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If a force is applied on one side of the seesaw, what is the moment created?
Depends on the
distance
from the
pivot
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How do we describe moments in relation to the pivot?
In terms of
clockwise
or
anti-clockwise
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What happens when the total clockwise moment equals the total anti-clockwise moment?
The seesaw
remains balanced
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How far from the pivot must an 800 newton force be to balance a 1200 newton meter moment?
1.5 meters
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What equation do we use to find the distance needed for balance?
Distance =
Moment
/ Force
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What are the key concepts related to moments?
Moment
is the
rotational effect
of a force
Calculated as
Moment = Force × Perpendicular distance
Perpendicular distance is crucial for maximizing moments
Moments can be
clockwise
or
anti-clockwise
Balance occurs when
total
clockwise equals total anti-clockwise moments
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