If Linear momentum is defined as 'mass x speed', can we state a principle of conservation of linear momentum as 'linear momentum of a system remains constant if no external force acts on it?

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Solution

Yes. But Not almost . A little Bit Of Addition Of Sum terms of great Importance Should be Added To your Statement.(vector sum of linear momentum)

The principle of conservation of linear momentum states that,

If no external forces act on the system of two colliding objects, then the vector sum of the linear momentum of each body remains constant and is not affected by their mutual interaction

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Q. Suppose we define a quantity 'Linear momentum' as linear momentum = mass × speed.
The linear momentum of a system of particles is the sum of linear momenta of the individual particles. Can we state principle of conservation of linear momentum as "linear momentum of a system remains constant if no external force acts on it"?

The linear momentum of a system of particles is the sum of linear momenta of the individual particles . Can we state a principle of conservation of linear momentum as "linear momentum of a system remains constant if no external force acts on it"???

Q. Assertion :To conserve linear momentum of a system, no force should act on the system. Reason: If net force on a system is zero, its linear momentum should remain constant.

Q. Use the definition of linear momentum from the previous question. Can we state the principle of conservation of linear momentum for a single particle?

Q. Statement 1: If no external force acts on a system of particles, then the centre of mass will not move in any direction
Statement 2: If net external force is zero, then the linear momentum of the system remains constant.

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