Answer to Question #212168 in Mechanics | Relativity for Anita

Question #212168

The Hamiltonian of a system is given in the form of the equation H = 1/2 (1/q^2 + p^2 q^4)

Write down the equation of motion for q !


1
Expert's answer
2021-07-05T16:13:45-0400

We know that

p˙=dHdq,q˙=dHdp-\dot{p}=\frac{dH}{dq},\dot{q}=\frac{dH}{dp}

p˙=ddq(12q2+p2q42)-\dot{p}=\frac{d}{dq}(\frac{1}{2q^2}+\frac{p^2q^4}{2})

p˙=1q3p2q3\dot{p}=\frac{1}{q^3}-p^2q^3

q˙=dHdp\dot{q}=\frac{dH}{dp}

q˙=ddp(12q2+p2q42)\dot{q}=\frac{d}{dp}(\frac{1}{2q^2}+\frac{p^2q^4}{2})

q˙=pq41\dot{q}=pq^4\rightarrow{1}

Equation (1) is called eqution of motion q



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