Question

state and prove the law of conservation of linear momentum​

Answer 1

Answer:

Two bodies of mass M and m are moving in opposite directions with the velocities v. If they collide and move together after the collision, we have to find the velocity of the system. Since there is no external force acting on the system of two bodies, momentum will be conserved.

OR

law of conservation of linear momentum :

according to this law the total linear momentum of an isolated system always remain constant or conserved when no force is acting on the Ed system.

momentum of body A before collision =m1u1

momemtum of body B before collision =m2u2

total momemtum before collision =m1u1+m2u2

momemtum of body A after collision =m1v1

momemtum of body B after collision =m2v2

total momemtum after collision =m1v1+m2v2

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)