Mechanics Flashcards by Michelle Lim

Flashcards in Mechanics Deck (8)

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Limiting equilibrium

- at the point of sliding
-maximum value of frictional force the surface can exert on object
-friction build up n up till it reach its maximum
-after that the object can move

Ff=uR

-when object is moving or at the point of sliding
-when object not moving F

F-Ff=ma

For cars,
P-R=ma
F/v-R=ma

a=0

F-Ff=0
F=Ff
P=R
F/v=R

a=+ve

Engine power>Resistance, so that vehicle accelerate is positive direction -->
F-Ff=+ve
F>Ff
P>R
F/v>R

a=-ve

Engine powerF-Ff=-ve
FPFv

Constant velocity
Maximum velocity
Minimum velocity

a=0
F-Ff=0
P-R=0
F/Vmin=R, haven't start accelerating
F/Vmax=R, doesn't accelerates further

a=0

Constant velocity
Maximum velocity (doesn't accelerate further)
Minimum velocity (haven't start accelerating)
F-Ff=0
P-R=0
F/Vmin=R
F/Vmax=R

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Limiting equilibrium

- at the point of sliding
-maximum value of frictional force the surface can exert on object
-friction build up n up till it reach its maximum
-after that the object can move

Ff=uR

-when object is moving or at the point of sliding
-when object not moving F

F-Ff=ma

For cars,
P-R=ma
F/v-R=ma

a=0

F-Ff=0
F=Ff
P=R
F/v=R

a=+ve

Engine power>Resistance, so that vehicle accelerate is positive direction -->
F-Ff=+ve
F>Ff
P>R
F/v>R

a=-ve

Engine powerF-Ff=-ve
FPFv

Constant velocity
Maximum velocity
Minimum velocity

a=0
F-Ff=0
P-R=0
F/Vmin=R, haven't start accelerating
F/Vmax=R, doesn't accelerates further

a=0

Constant velocity
Maximum velocity (doesn't accelerate further)
Minimum velocity (haven't start accelerating)
F-Ff=0
P-R=0
F/Vmin=R
F/Vmax=R

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Mechanics Flashcards Preview

From Flashcardlet > Mechanics > Flashcards

Limiting equilibrium

- at the point of sliding-maximum value of frictional force the surface can exert on object-friction build up n up till it reach its maximum-after that the object can move

Ff=uR

-when object is moving or at the point of sliding-when object not moving F

F-Ff=ma

For cars,P-R=maF/v-R=ma

a=0

F-Ff=0F=FfP=RF/v=R

a=+ve

Engine power>Resistance, so that vehicle accelerate is positive direction -->F-Ff=+ve F>FfP>RF/v>R

a=-ve

Engine powerF-Ff=-veFPFv

Constant velocity Maximum velocity Minimum velocity

a=0F-Ff=0P-R=0*F/Vmin=R, haven't start accelerating*F/Vmax=R, doesn't accelerates further

a=0

Constant velocity Maximum velocity (doesn't accelerate further)Minimum velocity (haven't start accelerating)F-Ff=0P-R=0*F/Vmin=R*F/Vmax=R

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- at the point of sliding
-maximum value of frictional force the surface can exert on object
-friction build up n up till it reach its maximum
-after that the object can move

-when object is moving or at the point of sliding
-when object not moving F

For cars,
P-R=ma
F/v-R=ma

F-Ff=0
F=Ff
P=R
F/v=R

Engine power>Resistance, so that vehicle accelerate is positive direction -->
F-Ff=+ve
F>Ff
P>R
F/v>R

Engine powerF-Ff=-ve
FPFv

Constant velocity
Maximum velocity
Minimum velocity

a=0
F-Ff=0
P-R=0
F/Vmin=R, haven't start accelerating
F/Vmax=R, doesn't accelerates further

Constant velocity
Maximum velocity (doesn't accelerate further)
Minimum velocity (haven't start accelerating)
F-Ff=0
P-R=0
F/Vmin=R
F/Vmax=R