Which requires the greater average net force? Circle or highlight your answer and defend your choice.   (a) stopping a 0.0001 kg fly traveling at 1 m/s in a time Δt =1s, or (b) maintaining a constant velocity (100 m/s east) for a 2000 kg car in a time Δt =1000s?   Can you please provide detail reason? Thank you for your help

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