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(Solved): (b) Consider Lagrangian L of an N particle system. Show that total momentum of this system will be c ...



(b) Consider Lagrangian

L

of an

N

particle system. Show that total momentum of this system will be conserved if the Lagrangian remains invariant under translation

vec(r)_(i)longrightarrowvec(r)_(i)+vec(d)

(Homogeneity of space), here

vec(d)

is an arbitrary small constant translation vector. (c) Hamiltonian

H=H(q_(i),p_(i),t)

and the canonical equations of motion :

q_(i)^(?)=(delH)/(delp_(i))

and

p_(i)^(?)=-(delH)/(delq_(i))

. Using Legendre transformation find out Lagrangian

L=L(q_(i),q_(i)^(?),t)

.

(1+3)+3+3


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