Velocity of the board if she jumps from the board

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My surfing instructor is about 70kg in mass and the board has about 15kg.If she jumps into the ocean near the pier by huntington beach california and a velocity of 10 m/s forward from the bound to safe someone, how fast the board moves? Assuming out the beginning neither her or the board are moving.

What if the board and she were moving at the same velocity of 5m/s what would be the velocity of the board if she jumps from the board at 10 m/s

Reference no: EM132521211

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