Two bodies P and Q interact only with each other inside a perfectly isolated box
PHYSICS · Subjective · A Level · Physics · Mechanics and materials · Mechanics and materials
Problem
Two bodies P and Q interact only with each other inside a perfectly isolated box.
(i) State Newton\'s Third Law of Motion.
(ii) Explain, with reference to the law stated in part (i), why the internal forces between P and Q do not change the total momentum of the two-body system.
(iii) List the assumptions required for the conclusion reached in part (ii) to hold true.