Summary Forces and particles notes grade 9?

Forces Riley
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a force is a push pull or a twist

Symbol Fo subscript

force of gravity force exerted
Fg byEarths gravity 9.8

force of friction Ff It requires a surface It acts opposite to the motion

force applied Fa

Normal force Fn It requires a surface It acts perpendicular to the surface


Unitsnewtons n
low to draw forces
we draw forces with arrows

ropertles of forces

Directions

magnitude

you can add or subtract them

samagatolian
s
net force youhavemultiple forces
resultedforce reduced to one force

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If going in samedirection

then add if onopposite
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sides thensubtract

, siiQEftriiiiis If
force is the same
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then the result is




Two catagorys of forces
contact forces 2 non contact forces

amples 11 normalforce Examples21 Gravity gravitational force



Fg and Fn 22 Electrostatics



e ofbookontable forceoftableonbook 23 Magenitism

frictionforce


Applied force


tension force forcefrompullingwitharope




Effects of a force
speed
up an object

slowdownanobject


changedirectionsofanobject


stretch anobject



compress
anobject

twistrotate an object





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