hagopbul
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- There this example in analytical mechanics which I am not able to understand
Hello :
There is this example ,on analytical mechanics , which I am not able to understand why he solve it in that way
We have a bead moving on a parabola that it's equation is y = b*x^2
Find the equation of motion
Constrain equations :
y=b*x^2
z=0
The bead have only one coordinate call it x ,x(dot)=d(x)/dt, y(dot)=d(y)/dt , z(dot) = d(z)/dt
x(dot)^2 = x(dot)*x(dot)
Kinetic energy:
T = 1/2*m*(x(dot)^2+y(dot)^2+z(dot)^2)
=1/2*mx(dot)^2*(1+4*b^2*x^2)
Here is my question how he reached this above line
Why y(dot)^2 = 4*b^2*x^2*x(dot)^2
Shouldn't y(dot)^2 = 4*b^2*x^2
I am reviewing this class and just not able to find why it is like that
Regards
H
There is this example ,on analytical mechanics , which I am not able to understand why he solve it in that way
We have a bead moving on a parabola that it's equation is y = b*x^2
Find the equation of motion
Constrain equations :
y=b*x^2
z=0
The bead have only one coordinate call it x ,x(dot)=d(x)/dt, y(dot)=d(y)/dt , z(dot) = d(z)/dt
x(dot)^2 = x(dot)*x(dot)
Kinetic energy:
T = 1/2*m*(x(dot)^2+y(dot)^2+z(dot)^2)
=1/2*mx(dot)^2*(1+4*b^2*x^2)
Here is my question how he reached this above line
Why y(dot)^2 = 4*b^2*x^2*x(dot)^2
Shouldn't y(dot)^2 = 4*b^2*x^2
I am reviewing this class and just not able to find why it is like that
Regards
H