To move back and forth quickly is to?

To move back and forth quickly is to?

• A. Vibrate
• B. Sway
• C. Oscillate
• D. Rotate

Answer: (A)

Movement that goes back and forth in a regular cycle around a central position is called oscillation. When something oscillates, it swings between two extremes, repeating the motion over and over. That fit describes moving back and forth quickly quite well, because the motion is centered around an equilibrium point and repeats with each cycle. Vibrate is related but usually emphasizes rapid, often smaller-scale tremors about a point, not necessarily a full back-and-forth cycle along a path. Sway suggests a slower side-to-side motion, often with a noticeable tilt, and rotate is turning around an axis, not moving back and forth along a line. So the best fit for moving back and forth quickly is oscillate.

Movement that goes back and forth in a regular cycle around a central position is called oscillation. When something oscillates, it swings between two extremes, repeating the motion over and over. That fit describes moving back and forth quickly quite well, because the motion is centered around an equilibrium point and repeats with each cycle.

Vibrate is related but usually emphasizes rapid, often smaller-scale tremors about a point, not necessarily a full back-and-forth cycle along a path. Sway suggests a slower side-to-side motion, often with a noticeable tilt, and rotate is turning around an axis, not moving back and forth along a line. So the best fit for moving back and forth quickly is oscillate.