Physics, 25.03.2020 18:18 jessecabrown1

If the total momentum of a system is changing:

(a) particles of the system must be exerting forces on each other
(b) the system must be under the influence of gravity
(c) the center of mass must have a constant velocity
(d) a net external force must be acting on the system
(e) none of the above

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If the total momentum of a system is changing:

(a) particles of the system must be exer...

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