-Newtons Laws- _
-Force-
Push
·
or pull
·
N
Contact
·
:
-
Tension
-
Friction
Non-contact
·
Gravity
-
Magnetic
-
Weight : The
gravitational force the earth excerts on
any object on or near it's surface
Eg = m
.
g
-Normal Force _ -
Perxindicular force exerted by a surface on an object in contact with it
Fu
FN
10kg
Eg
long To!
Fu =
Fg Eg
Vertical force down box
=
mg on
= 10(9 8) .
En =
Eg Fa(V) +
-
=
98Nup = 10(9 8) + 100sin30
.
= 148N
Newtons 1st Law : An object continues in a state of rest or uniform velocity unless it is acted upon by a net or
resultant force
-Eriction Force
Force that opposes the motion of an object -
g Friction ! Kinetic friction
Fts(max) =
Ms
. En
F I
Fts(mas) a maximum force of static friction Applied force
Ms - coefficient of static friction
Fr =
Uk Fr ·
FN - Normal force
FfH o Kinetic friction
Friction stationary object
·
on
ah a coefficient of Kinetic friction
·
Friction on
moving object
-Force-
Push
·
or pull
·
N
Contact
·
:
-
Tension
-
Friction
Non-contact
·
Gravity
-
Magnetic
-
Weight : The
gravitational force the earth excerts on
any object on or near it's surface
Eg = m
.
g
-Normal Force _ -
Perxindicular force exerted by a surface on an object in contact with it
Fu
FN
10kg
Eg
long To!
Fu =
Fg Eg
Vertical force down box
=
mg on
= 10(9 8) .
En =
Eg Fa(V) +
-
=
98Nup = 10(9 8) + 100sin30
.
= 148N
Newtons 1st Law : An object continues in a state of rest or uniform velocity unless it is acted upon by a net or
resultant force
-Eriction Force
Force that opposes the motion of an object -
g Friction ! Kinetic friction
Fts(max) =
Ms
. En
F I
Fts(mas) a maximum force of static friction Applied force
Ms - coefficient of static friction
Fr =
Uk Fr ·
FN - Normal force
FfH o Kinetic friction
Friction stationary object
·
on
ah a coefficient of Kinetic friction
·
Friction on
moving object
