Question

Expression for law of conservation of momentum can be derived by using-​

Answer 1

$\huge\underline{\underline{\red{\textbf{Explanation : -}}}}$

› Momentum

The momentum of body is defined as the product of it's mass and velocity .

⠀⠀⠀⠀⠀$\pink{\sf{Momentum =mass\times\: velocity }}$

where,

⠀⠀⠀⠀⠀››$\orange{\rm{p = momentum}}$

⠀⠀⠀⠀⠀››$\orange{\textrm{m = mass of body}}$

⠀⠀⠀⠀⠀››$\orange{\rm{v = velocity}}$

Note :

• If a body is at rest , it's velocity is zero and hence it's momentum is Also zero.

• The unit of momentum is kg m/s

Expression for law of conservation of momentum can be derived by using$\underline{\orange{\textrm{Newton's second law of motion}}}$

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Answer 2

Newton's third law states that for a force applied by an object A on object B, object B exerts back an equal force in magnitude, but opposite in direction. This idea was used by Newton to derive the law of conservation of momentum. ... B=m_{2}(v_{2}-u_{2}) (change in momentum of particle B)