physical quantities that have magnitude/size and NO direction
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vector
physical qauntities that have size/magnitued and direction
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distance
the length of a path between 2 points.always a positive number,indirect to the direction you take
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displacement
the distance in a certain direction in a straight line from the start point to the end point (direct/shortest route)
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resultant force
if you have a number of forces acting on an object,you can replace them with a single force which has the same affects *** all the orginal forces
a=0 b=0 a+b=0
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moment
is a turning force dependant on the size of applied force and the perpendicular distance from a pivot the force is applied
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centre of mass
the mass of an object may be considered to act at a single point reffered to as the objects centre of mass
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tangent
90" from the centre
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moment equation
moment(Nm)=force (N) x distance(m)
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velocity(m/s)
distance(m) x time(s)
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gradient
change in y / change in x
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examples of vectors
velocity
distance
force
acceleration
momentum
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examples of scalars
volume
speed
mass
pressure
distance
power
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if the resultant force onto an object is 0 and ;
-if the object is stationary and remains so
-if the object is moving than it will keep moving at the same velocity
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vectors are usually representes by...
an arrow-the length of the arrow shows the magnitude and the direction of the arrow shoes the direction of the quantity
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contact force
when 2 objects have to touching for a force to act, that force is called an contact force
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contact force examples
friction
air resistance [drag]
tension in ropes
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non-contact force
if the object does not need to be touching force the force to act than this is a non-contact force
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non-contact force eamples
magnetic force
gravitional potential force
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interaction pair(newtons third law)
when 2 objects interact,there is a force produced on both objects. an interaction pair is a pair of forces that are qual and opposite and act on 2 interacting objects
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THE FORCE APPLIED ON A SERIES OF CONNECT GEARS IS THE
SAME
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the smaller the radius...
the smaller the moment but faster it will go
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the larger the radius
the larger the moment but the slower it will go
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if you suspend an object and release it will come to rest
with its centre of mass directly below the point of suspension. a object is stable if the centre of mass is within the base
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the size of a moment depends on
the size of applied force
the perpendicular distance from a pivot the force is applied
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leavers act as
force multipliers which means they reduce the force neefed to perform tasks
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Other cards in this set
Card 2
Front
scalar
Back
physical quantities that have magnitude/size and NO direction
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