Question

explain the law of conservation of linear momentum......​

Answer 1

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explain the law of conservation of linear momentum

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Conservation of linear momentum, general law of physics according to which the quantity called momentum that characterizes motion never changes in an isolated collection of objects; that is, the total momentum of a system remains constant. 

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Answer 2

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⠀⠀⠀⠀⠀⠀⠀Conservation of Momentum

➫ A system in which the momentum of a system is constant if there are no external forces acting on the system.

VERIFICATION

Let the Body A = m1 & B = m2

Let their velocity be u1 & u2

• (u1 > u2)

Momentum of Body

A = m1u1 & B = m2u2

Initial & Final momentum of System

• ➾ m1u1 + m2u2

Body A exert force of Action

• ➾ Fᴀʙ on Body B.

◉ Body B exert force of Reaction

• ➾ Fʙᴀ on Body A.

▸ Fᴀʙ = Body A

• ➾ m1 (v1 - u1) / t

▸ Fʙᴀ = Body B

• ➾ m2 (v2 - u2) / t

▸ Since, Action = - reaction

▸ So, Fᴀʙ = - Fʙᴀ

• m1 (v1 - u1) / t = - m2 (v2 - u2) / t
• ▸ m1v1 - m1u1 = m2v2 + m2u2
• ▸ m1v1 - m2v2 = m1u1 + m2u2