The Momentum of a System of Particles Is Changing at the Rate

question 7

Multiple Choice

The momentum of a system of particles is changing at the rate of 0.71 t + 1.2 t², in kg∙m/s.The net force at t = 2.0 s

• A)cannot be determined without knowing the masses of the particles.
• B)is 5.5 N
• C)is 3.1 N
• D)is 1.9 N
• E)cannot be determined without knowing the momentum at t = 0

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