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Summary in-depth, complete analysis of newtons laws
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in-depth, complete analysis of newtons laws with defintions, examples and quick tricks to help you understand
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, NEWTONS LAWSNEWTONS FIRST / HW _
An object continues in a state or rest or uniform C constant velocity unless acted
upon by a net or resultant force .
in order to move a
stationary body or change the velocity or direction of a moving body a resultant Cret )
force is needed All bodies have inertia and
. resist changes in their state of motion -
The greater the mass at the
body the greater its inertia .
INERTIA _
the
property or an object which causes it to resist a
change in its state arrest or uniform notion .
FR / ( T / ON ( Ff) -
the force their opposes the motion or an object
force between that
'
if the object is stationary it experiences a force of static friction ; which is the 2 surfaces
prevents those surfaces from slipping or sliding across each other , it balances the applied force
'
if the object is it experiences force of kinetic friction FK motion when object moves and
equal to the
'
moving a
, opposes an is
applied force when an
object moves at constant velocity .
"
when a block is pulled across a rough surface by an
applied force ( Fa) . As fa increases the static friction force increases
in magnitude equal to the applied force .
"• ✗
when F- a f-s )
•
the block will only to enough to the maximum force of static friction ( opposing
begin move is great overcome notion .
•
Once the block begins to move the force ◦ C kinetic Cdynamic) friction is slightly less than the force of static friction
'
Friction depends on the
type of material and roughness of the surface .
•
Does not depend on the area in contract between the surfaces .
\
The force of friction is to the normal force
directly proportional
force of friction Cfsnax) LESS inclined plane
•
The maximum static is an an
the inclined plane the normal force fn is weight G
•
On less than the since it is a
component of the height Cfn =
Fg 1)
Max Max
Fs =
Ms .
Fn Fs =
maximum force of static friction
"
The formula given for max static friction is ONLY used
f- k Mk Fn Fk force of kinetic (dynamic) friction when the object is at the moving
= .
=
point or
•
>
Mk for the Ms coefficient of static friction The force ol kinetic friction constant for pair
is
giver
=
Ms same a
set of surfaces MK =
coefficient of kinetic friction 0L Surfaces
•
fn -
-
normal force The
rougher the surface the higher the cockiest
of friction would be
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