Position, Velocity and acceleration

AI Thread Summary
An object too far from the motion detector produces an incorrect distance reading due to the limitations of the detector's range and sensitivity. When using a single motion detector, one-dimensional motion is considered because the device can only measure movement along a single axis. In a velocity vs. time graph, a stationary, distant object would show a constant zero velocity until an object is introduced into the detector's beam, at which point the velocity would spike. The discussion emphasizes the importance of understanding the principles of motion detection and graph interpretation. Accurate readings depend on the object's proximity and the detector's capability to measure motion in one dimension.
smh745
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Hi,

I'm new member and I would like to ask 2 questions:

1) Explain why an object too far from the motion detector will produce an incorrect distance reading?

2) Explain why we only consider one-dimesional motion when using a single motion detetor. Based on the definition of velocity, describe what you should observe in the velocity vs. time graph if you were measuring a stationary, distant object and you suddenly slid an object into the beam from the side.
 
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