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## Answers

⌡F dtis a vector quantity (since force is a vector and time is a scalar).Impulse-Momentum TheoremThe impulse-momentum theorem states that the change in momentum of an object equals the impulse applied to it.J = ΔpIf mass is constant, then…F̅Δt = mΔvIf mass is changing, then…F dt = m dv + v dmThe impulse-momentum theorem is logically equivalent to Newton's second law of motion (the force law).UnitsThe SI unit of impulse is the newton second.The SI unit of momentum is the kilogram meter per second.These units of impulse and momentum are equivalent.[N s = kg m/s]