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A 70 kg firefighter jumps from a roof. The instant she starts to jump her center of mass has a vertical velocity of zero

A 70 kg firefighter jumps from a roof. The instant she starts to jump her center of mass has a vertical velocity of zero and is 5 meters above the surface of a landing mat. When she lands on the mat, the mat compresses 1.2 meters before she comes to a stop. How much work does the landing mat perform to stop her? mv, mgh, U = AEnergy, P = Fu

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