Conservation laws: Identify the incorrect attribution Statement to evaluate: "According to the principle of conservation of energy, the total momentum of a system in any direction remains constant unless acted upon by an external force in that direction." Choose whether the statement is correct or incorrect.

Mechanical Engineering Engineering Mechanics Difficulty: Easy
Choose an option
  • A
    Correct
  • B
    Incorrect

Answer

Correct Answer: Incorrect

Explanation

Given dataWe are judging a statement that mixes conservation laws.

Concept/ApproachConservation of momentum (not energy) states that in the absence of external force along a direction, total momentum along that direction remains constant. Conservation of energy states total energy of an isolated system remains constant.

Step-by-stepThe statement assigns a momentum result to the energy principle.Therefore the attribution is wrong.

Common pitfallsInterchanging momentum and energy conservation statements.

Final AnswerIncorrect

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