Friction affects the motion of a water tube in the following ways:
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It exerts a force to bring the tube to a stop. (True, as friction resists motion and can bring an object to a stop.)
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It opposes the force of the boat pulling the tube forward. (True, as friction acts in the opposite direction to the motion of the tube.)
The other options do not accurately describe the influence of friction:
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It causes the tube to accelerate forward. (False, friction does not cause acceleration; it opposes motion.)
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It speeds up the tube. (False, friction does not speed up the tube; it acts to slow it down.)
So, the correct selections are:
- It exerts a force to bring the tube to a stop.
- It opposes the force of the boat pulling the tube forward.