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For one-dimensional motion, the angle between velocity and acceleration is either 0° or 180° and it does not change with time.

1. True
2. False
3. Cannot be determined
4. None of the above

Correct answer: True

Solution

In one-dimensional motion, velocity and acceleration are either in the same direction (0°) or opposite directions (180°), and this relationship remains constant over time as the motion is constrained to a single line.

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