Question: A 1-kg box is accidentally dropped from a third-floor window (7.5 mathrm{~m}) above the ground. What is the change in its momentum as it strikes

A 1-kg box is accidentally dropped from a third-floor window $7.5 \mathrm{~m}$ above the ground. What is the change in its momentum as it strikes the muddy ground, coming to a complete stop?

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