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Force is
Resultant Force measured in
Newtons (N)
Definition of Resulting Force
The added total of all the forces acting upon
an object to give a single force which has the
same effect on the object as all the forces. The
resultant force shows the outcome of the
forces acting on an object.
A Still Object will stay stationary if the sum of
all the forces acting upon the object remain at
O.
A Moving Object with a resulting force of O will
continue to move at the same speed in the
same direction.…read more

Slide 3

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Resultant Force Not Equal To
`0'
If the resultant force is NOT EQUAL TO `0'
then the object will either...
1) Accelerate in the direction of the resultant
force (the longer arrow on a diagram)
2) Begin to move in the direction of the resultant
force.
...This depends on whether the object was moving
to begin with, if the object was already moving
then rule 1 applies. If the object was stationary then
rule 2 applies.…read more

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Three Possible Outcomes (when
the resultant force doesn't equal 0)
2) The weight was
already moving
upwards but now it is
moving faster
1) The bar was
still and has
begun to move
upwards as a
result of the
force . 3) The weight was
already moving
downwards but now
more slowly.…read more

Slide 5

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Force, Mass and Acceleration
Objects only accelerate when the resultant
force is NOT `O'(zero)
Factors Affecting The Size of Acceleration
SIZE OF FORCE THE MASS
An object will accelerate in the direction of the An object will accelerate in the direction of the
resultant force! resultant force! A force acting on a large mass
The bigger the force the greater the acceleration will have less acceleration then if the same force
was applied to an object with a smaller mass.
Size x2 = Acceleration x2 Mass x2 = Acceleration ÷ 2…read more

Slide 6

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Distance Time Graphs
The vertical axis of the distance time
graph shows the total distance
travelled from the starting position.
The horizontal axis is the time from
the start.
When an object is stationary the line
on the distance time graph is
horizontal with no gradient.
When an object is moving the at a
steady speed in a straight line the
line on the graph is straight and has
a positive gradient ( is sloped).…read more

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