Ricardo (R) and Maria (M) are in a canoe that is stationary and floating on a ca

Question

Ricardo (R) and Maria (M) are in a canoe that is stationary and floating on a calm lake. They are 4.0 m apart, symmetrically located about the center of the canoe as shown in the figure on the left. Ricardo has mass 80 kg, and the canoe is massless. The canoe is free to move in the water without friction. Ricardo and Maria both move to the center of the canoe. Ricardo notices that the canoe moves a distance d = 0.25 m relative to a rock that is stationary in the water. While Ricardo and Maria are moving to the center of the canoe, the momentum of the system (canoe + Maria + Ricardo) is ...

a) nonzero, and point to the right

b) nonezero, and point to the left

c) zero

Explanation / Answer

BY conservation of momentum

answer is C) ZERO

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