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A block is sliding down an incline with a constant velocity. Which one of the following must be true? A. The normal force is equal and opposite to the friction force. B. The component of the gravitational
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A block is sliding down an incline with a constant velocity. Which one of the following must be true?

A. The normal force is equal and opposite to the friction force.
B. The component of the gravitational force parallel to the incline has the same magnitude as the friction force.
C. The friction force is equal and opposite to the gravitational force.
D. The component of the gravitational force parallel to the incline is equal to the normal force.
E. The friction force is zero.

User Jim Hudson
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I think it's c, a, b, or e, I'm not really sure
User Hawkeye Parker
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