Determine what is your friend mass

Reference no: EM13668139

You (mass 80 kilogram) and your friend (mass unknown) are in a rowboat (mass 60 kilogram) on a calm lake. You are at the center of the boat rowing and she is at the back, 2 meter from the center. When the boat comes to rest, you change places. You notice that after changing places the boat has moved 20 centimeter relative to a fixed log. Determine what is your friend mass?

Reference no: EM13668139

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