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Physics 21 Online
OpenStudy (anonymous):

what is external forces, internal forces,net force, and law of conservation of momentum?

OpenStudy (shayaan_mustafa):

FORCE that agent which changes or tries to change the state of the body or object. EXTERNAL FORCES: like air particles and gravity acting on a free falling ball. INTERNAL FORCES: like random motion of electrons in a conductor. NET FORCE sum of internal and external forces. LAW OF CONVERSATION OF MOMENTUM the total momentum of an isolated system of interacting bodies remains constant before and after the collision..

OpenStudy (mos1635):

|dw:1333444948695:dw| F1or F1'= force from body of the system you study, to body of the system toy study=internal F2 or F3 from body out of system to body of system=external F2' or F3' are not cald enything, they are NOT force to bodys o system

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