QQuestionPhysics
QuestionPhysics
Which equation best describes the law of conservation of momentum?
A. p=mv
B. F=ma
C. Δp=FΔt
D. p initial =p final
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Answer
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Step 1: Understand the concept of the law of conservation of momentum
The law of conservation of momentum states that the total momentum of a closed system remains constant unless acted upon by an external force.
Step 2: Identify the options that represent the law of conservation of momentum
Option A, p = mv, is the definition of momentum, not the law of conservation of momentum. Option B, F = ma, is Newton's second law, not the law of conservation of momentum. Option C, Δp = FΔt, is Newton's second law in the form of impulse-momentum theorem, which relates the change in momentum to the force applied over time. This is not the law of conservation of momentum. Option D, p\_initial = p\_final, represents the law of conservation of momentum, as it states that the initial momentum (p\_initial) of a closed system is equal to the final momentum (p\_final) of that system.
Final Answer
The correct equation that best describes the law of conservation of momentum is p\_initial = p\_final.
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