Physics Motion
Physics Motion - Related Videos
06:03
Motion-induced Blindness
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2023
Source: Laboratory of Jonathan Flombaum—Johns Hopkins University One thing becomes very salient after basic exposure to the science of visual perception and sensation: what people see is a creation of the brain. As a result people may fail to see things, see things that are not there, or see things in a distorted way. To distinguish between physical reality and what people perceive, scientists use the term awareness to refer to what people perceive. To study awareness, vision scientists often...
11:41
Kinematics and Projectile Motion
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2023
Source: Ketron Mitchell-Wynne, PhD, Asantha Cooray, PhD, Department of Physics & Astronomy, School of Physical Sciences, University of California, Irvine, CA This experiment demonstrates the kinematics of motion in 1 and 2 dimensions. This lab will begin by studying motion in 1 dimension, under constant acceleration, by launching a projectile directly upward and measuring the maximum height reached. This lab will verify that the maximum height reached is consistent with the kinematic...
05:21
General Approach to the Physical Exam
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2023
Source: Jaideep S. Talwalkar, MD, Internal Medicine and Pediatrics, Yale School of Medicine, New Haven, CT The examination of the body is fundamental to the practice of medicine. Since the Roman Empire, physicians have described the connection between alterations in function of specific parts of the body and specific disease states and have sought to further scientific understanding to improve bedside diagnosis. However, in this modern age of increasing technology within medical diagnostics, it...
07:52
Hooke's Law and Simple Harmonic Motion
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2023
Source: Ketron Mitchell-Wynne, PhD, Asantha Cooray, PhD, Department of Physics & Astronomy, School of Physical Sciences, University of California, Irvine, CA Potential energy is an important concept in physics. Potential energy is the energy associated with forces that depend upon the position of an object relative to its surroundings. Gravitational potential energy, which is discussed in another video, is the energy associated that is directly proportional to the height of an object above...
08:45
Assessment of Physical Activity Intensity with Accelerometers and Oxygen Consumption
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2025
Here, we present a protocol to assess physical activity intensity levels measured with indirect calorimetry and two accelerometers (on the right wrist and waist) during an incremental walking-jogging test (from 0.84 to 2.37 m/s) on an oval track. The results show differences among the physical intensity assessed through those methods.
FAQs
A reference frame establishes the standpoint from which position and its change are measured. Because motion is described relative to that frame, the reported displacement, velocity, and acceleration depend on the chosen basis for comparison. Stating the frame makes measurements interpretable and allows different descriptions of the same event to be organized consistently.
Measurements of displacement, velocity, and acceleration describe what occurs, while dynamics links those quantities to forces and mass through Newton’s laws. This connection adds a causal account of mechanical behavior: instead of only modeling an object’s changing state, researchers can examine how interactions produce or influence that motion. It is especially useful when analyzing physical systems.
They capture different stages of describing a changing position. Displacement records the positional change, velocity characterizes that change in relation to time, and acceleration tracks how velocity changes. Using the three together lets a model represent motion more precisely than position alone, supporting predictions about trajectories and other mechanical behavior.
Researchers begin by measuring an object’s position at specified times, then use those observations to describe displacement, velocity, and acceleration. A mathematical model organizes the measured changes and supports predictions about trajectories, collisions, or mechanical behavior. This workflow connects direct observations with a systematic description of how a physical system changes.
The framework can describe falling bodies, planetary orbits, collisions, and other forms of mechanical behavior. It supports engineering and transportation studies, while astronomy and biomechanics provide additional settings for examining physical systems. The application changes with the object and interaction under study, but each uses measured or modeled motion to investigate system behavior.
Motion analysis provides a foundation for investigating energy and momentum, even when those topics are the immediate focus. Displacement, velocity, acceleration, forces, and mass connect observed changes with broader questions about a system’s mechanical state and interactions. This relationship places motion studies within the larger investigation of physical systems and their governing interactions.