In: Physics
Consider three particles that interact with
internal forces given by ? ⃗ 1→2, ? ⃗ 3→1,
etc. The total
force on the system is the sum of these internal forces with any
external forces
(? ⃗ i,ext , ?ℎ??? ? = 1,2,3). By
writing out the sum explicitly, use Newton’s third law to prove
that
the total acceleration of the system is only due to the external
forces.