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F = m . V2
R
F = m . ac
P - NA = m . ( VA )2
R A
NB - P = m . ( VB )2
RB
VA
VB
A
B
P
P
NA
NB
O
O
ac
ac
N = P T = m . V 2
R
R
O T
N
P
NB + P = m . ( VB ) 2
R
N B = 0 ... Vmin = R . g
B
A
R
VB
VA
P
N
P N
NA - P = m . ( VA)2
R
N = P
Fat = m . V2
R

N
P
O
Fat
ac
X
µ = ?Solução:
Fat = m . V2
R
µ . P = m . V2
R
µ . m . g = m . V2
R
µ . 10 = 400
200
µ . 10 = 2
µ = 2 : 10
µ = 0,2
µ . 10 = 202
200
72 km/h : 3,6
20 m/s
N = ?Solução: P - NA = m . ( VA )2
R A
(1000 . 10) - N = 1000 . 202
80
10000 - N = 1000 . 400
80
10000 - N = 1000 . 5
10000 - N = 5000
10000 - 5000 = N
5000 = N
N = 5000 N
VA
VB
A
B
P
P
NA
NB
O
O
ac
ac
Solução:
N - P = m . ( V )2
R
N – (2 . 10) = 2 . 22
1
N – 20 = 2 . 4
N – 20 = 8
N = 8 + 20
N = 28 newtons
N = ?
N
P
N > P
Força centripeta

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Força centripeta

  • 1.
  • 2.
  • 3. F = m . V2 R F = m . ac
  • 4. P - NA = m . ( VA )2 R A NB - P = m . ( VB )2 RB VA VB A B P P NA NB O O ac ac
  • 5. N = P T = m . V 2 R R O T N P
  • 6. NB + P = m . ( VB ) 2 R N B = 0 ... Vmin = R . g B A R VB VA P N P N NA - P = m . ( VA)2 R
  • 7. N = P Fat = m . V2 R  N P O Fat ac
  • 8.
  • 9. X
  • 10. µ = ?Solução: Fat = m . V2 R µ . P = m . V2 R µ . m . g = m . V2 R µ . 10 = 400 200 µ . 10 = 2 µ = 2 : 10 µ = 0,2 µ . 10 = 202 200 72 km/h : 3,6 20 m/s
  • 11. N = ?Solução: P - NA = m . ( VA )2 R A (1000 . 10) - N = 1000 . 202 80 10000 - N = 1000 . 400 80 10000 - N = 1000 . 5 10000 - N = 5000 10000 - 5000 = N 5000 = N N = 5000 N VA VB A B P P NA NB O O ac ac
  • 12. Solução: N - P = m . ( V )2 R N – (2 . 10) = 2 . 22 1 N – 20 = 2 . 4 N – 20 = 8 N = 8 + 20 N = 28 newtons N = ? N P N > P