| 1. | In running, however, the arms move in a forward-backward motion in relation to the trunk.
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| 2. | He catches balls less frequently because of the pitcher's backward motion ( the frequency decreases ).
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| 3. | Simpson started rocking in his seat in a forward-backward motion, often looking up at the ceiling.
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| 4. | The video was shot in a backward motion.
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| 5. | Rapid forward-backward motion, such as punching in a boxing game, is controlled by the acceleration sensors.
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| 6. | One roller detects the forward backward motion of the mouse and other the left right motion.
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| 7. | The reason for this is that, unlike the forward-backward motion, both arms are synchronized in their upward-downward movement.
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| 8. | The curtain arrests the backwards motion of struck balls and pins, so that they fall onto the pit.
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| 9. | When the hammer is pulled backwards the internal spring compresses, exerting exponential pressure against the hammer's continued backwards motion.
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| 10. | The stroke with the front segment pushes the creature backward a little, but the other segment is down limiting its backward motion.
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