Question

State law of conservation of linear momentum and derive mathematical expression for it.​

Answer 1

MATHEMATICAL EXPRESSION:

FROM NEWTON'S THEIR LAW,

$f12 = - f21$

F=∆p/t

$\frac{m2 v2 - m2 u2}{t} = \frac{m1v1 - m1 u1}{t} \\ m1u1 + m2u2 = m1v1 + m2v2$

Conversation of momentum is a law in Newtonian physics which states that the velocity of 2 object before colliding and after colliding is the same

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)