cringygaming12
30.03.2020 •
Physics
The force F acting on a particle constrained to move along the x - axis is given by the fucntion F ( x ) = a x ( b − c x 2 ) [ a = 8.97 , b = 7.83 , c = 5.65 ] Find the three equilibrium points x 1 , x 2 , and x 3 , and enter them in order of ascending x ‑coordinate.
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Ответ:
— 1.177
0
1.177
Explanation:
Given that,
F(x) = ax(b — cx²)
Given that,
a = 8.97
b = 7.83
c = 5.65
F(x) = ax(b—cx²)
F(x) = abx — acx³
F(x) = 8.97 × 7.83x — 8.97 × 5.65x³
F(x) = 70.2351x —50.6805x³
Then, For a body to be in equilibrium the sum of forces acting on the body is zero. i.e. F(x) = 0
0 = 70.2351x —50.6805x³
70.2351x —50.6805x³ = 0
x(70.2351 —50.6805x²) = 0
For the multiplication of two number to be zero, it is either one of the number is zero or both of the number is zero
Therefore,
x = 0 OR 70.2351 —50.6805x² = 0
x=0
70.2351 — 50.6805x² = 0
50.6805x² = 70.2351
x² = 70.2351/50.6805
x² = 1.38584
x = √1.38584
x = ± 1.177
Then, the equilibrium position is
- 1.177, 1.177 and 0
So, the ascending order of the equilibrium position is -1.177, 0, 1.177
Ответ: