We often perceive an object to be in motion when its position changes with time. However, there are situations where motion is inferred through indirect evidence, such as the movement of dust, leaves, and branches of trees indicating the motion of air.
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We often perceive an object to be in motion by observing changes in its position relative to a stationary background, detecting the object’s movement through our peripheral vision, or experiencing physical sensations of motion, such as vibrations or changes in speed, which our senses and brain interpret as movement.