fisica 04-leis de newton

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Prof. Anderson Coser GaudioTecnoLab  – Depto. Física  – CCE - UFES

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1 2

 F F F 

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 x y F F F 

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1 2 R F F 

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ˆ ˆ x y F F i F j

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0 F  

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2cr  F m v    

cf   F m r   

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a F 

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1am

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 F ma

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 F ma

 x x

 y y

 z z 

 F ma

 F ma

 F ma

 x

 y

 z 

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 g  F mg 

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12 21 F F 

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B/A A/B F F 

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1   T T j

2   T T j

1 1m g  P j

2 2m g  P j

1   a

a j

2   a a j

m1

P1

P2

T1

T2

m2

 x

 y

o

m1

P1

P2

T1

T2

m2

 x

 y

o

1 2 a a

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1 1 1mF a

1 1 1 1m P T a

1 1 1m g T m a  j j j

1 1 1   (1)T m a m g  

2 2 2mF a

2 2 2 2 2 1m m P T a a

2 2 1m g T m a  j j j

2 1 2   (2)T m a m g  

2 11

1 2

m ma g 

m m

2 1

11 2

m m

 g m m

a j

2 12

1 2

m m g 

m m

a j

m1

P1

P2

T1

T2

m2

 x

 y

o

m1

P1

P2

T1

T2

m2

 x

 y

o

1 2 a a

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2 11

1 2

m m g 

m m

a j

2 12

1 2

m m g m m

a j

m1

P1

P2

T1

T2

m2

 x

 y

o

m1

P1

P2

T1

T2

m2

 x

 y

o

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1   T T i2

  T T j

1 1m g  P j2 2m g  P j

1   aa i 2   a a j

1 1m g N jm1

P2

T1

T2

m2

 x

 y

o

P1

N1

1 2a a

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1 1 1mF a

1 1 1 1 1m P N T a

1 1 1 1m g m g T m a  j j i i

1 1   (1)T m a

2 2 2mF a

2 2 2 2m P T a

2 2 2 2 1m g T m a m a  j j j j

2 1 2   (2)T m a m g  

21

1 2

ma g 

m m

2

11 2

m g 

m m

a i

22

1 2

m g 

m m

a j

m1

P2

T1

T2

m2

 x

 y

o

P1

N1

1 2

a a

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21

1 2

m g 

m m

a i

22

1 2

m g m m a j

m1

P2

T1

T2

m2

 x

 y

o

P1

N1

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