Question:

Conservation of linear momentum is equivalent to

Updated On: Jul 5, 2022
  • Newton?s law of gravity
  • Newton?s first law of motion
  • Newton?s second law of motion
  • Newton?s third law of motion
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The Correct Option is B

Solution and Explanation

The law of conservation of linear momentum states that in absence of an external force, the linear momentum of a body remains constant. And Newton?s first law states that until and unless an external force is applied a body in a state of rest will tend to be in a state of rest and body in motion will tend to keep on moving without a charge of speed and direction. In other words if a body is in a state of rest then its momentum is zero and the first law tells that the body tries to preserve its zero momentum. And when in motion (momentum ?mv?), the body tries to preserve its momentum mv again. Which is the law of conservation of momentum.
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Concepts Used:

Laws of Motion

The laws of motion, which are the keystone of classical mechanics, are three statements that defined the relationships between the forces acting on a body and its motion. They were first disclosed by English physicist and mathematician Isaac Newton.

Newton’s First Law of Motion

Newton’s 1st law states that a body at rest or uniform motion will continue to be at rest or uniform motion until and unless a net external force acts on it.

Newton’s Second Law of Motion

Newton's 2nd law of motion deals with the relation between force and acceleration. According to the second law of motion, the acceleration of an object as built by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.

Newton’s Third Law of Motion

Newton's 3rd law of motion states when a body applies a force on another body that there is an equal and opposite reaction for every action.