Correct Answer - Option 1 : External Force
CONCEPT:
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Momentum: A property of a body in motion that is equal to the product of the body's mass and velocity is called momentum.
P = mv
where P is the momentum of the body, m is the mass of the body, and v is the velocity of the body.
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Newton's Second Law of Motion: It says that the net external force on a system or body is equal to the change in momentum of the system or body divided by the time over which it changes.
Mathematically:
\(F_{ext} = {Δ p \over Δ t}\)
where Fext is the external force on the system, Δp is the change in momentum, and Δt is the change in time.
EXPLANATION:
Newton's second law of motion in momentum form can be written as:
\(F_{ext} = {Δ p \over Δ t}\)
which says the rate of change of momentum \( {Δ p \over Δ t}\) is equal to the external force on a system.
So the correct answer is option 1.
