SSC
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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velocity decreases
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velocity increases
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the objects have the same momentum before and after they collide.
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the objects have more momentum after they collide than they did before.
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Detailed explanation-1: -Law of conservation of momentum: The law states, in absence of external forces the momentum of the system is conserved . It means that the total momentum before the collision is equal to the total momentum after the collision.
Detailed explanation-2: -Conservation of momentum is a fundamental law of physics, which states that the total momentum of an isolated system is conserved in the absence of an external force.
Detailed explanation-3: -A system must meet two requirements for its momentum to be conserved: The mass of the system must remain constant during the interaction. As the objects interact (apply forces on each other), they may transfer mass from one to another; but any mass one object gains is balanced by the loss of that mass from another.