كلما زادت كتلة صندوق، فإنه يحتاج لقوة أكبر لدفعه. كلما زادت كتلة صندوق، فإنه يحتاج لقوة أكبر لدفعه,

Metaphysics Research Lab, Stanford University Any single force is only one aspect of a mutual interaction between two bodies
When the mass varies due to accretion or ablation, [an alternate equation explicitly accounting for the changing mass] should be used I]t is essential to deal with the same set of particles throughout the time interval[

Quoting Newton in the Principia: It is not one action by which the Sun attracts Jupiter, and another by which Jupiter attracts the Sun; but it is one action by which the Sun and Jupiter mutually endeavour to come nearer together.

15
كلما زادت كتلة صندوق، فإنه يحتاج لقوة أكبر لدفعه,
] Consequently, the mass of the system can not change during the time of interest
قانون نيوتن الثاني: ديناميكا الجسيمات
Cambridge UK: Cambridge University Press
قانون نيوتن الثاني: ديناميكا الجسيمات
Hannah, J, Hillier, M J, Applied Mechanics, p221, Pitman Paperbacks, 1971• "On the use and abuse of Newton's second law for variable mass problems"
Celestial Mechanics and Dynamical Astronomy
Cambridge UK: Cambridge University Press I Bernard Cohen Peter M

.

8
قوانين نيوتن للحركة
قانون نيوتن الثاني
قانون نيوتن الثاني: ديناميكا الجسيمات