Linear Motion
Linear Motion - Related Videos
01:26
Application of Antiderivatives: Linear Motion
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2026
A derivative describes how one quantity changes with respect to another, such as how velocity changes over time. The reverse process, which recovers a quantity from its rate of change, is known as integration. In physics, integration is fundamental because it links related physical quantities, allowing acceleration, velocity, and displacement to be understood as connected aspects of motion.Consider a car traveling at a steady speed of 20 meters per second when an obstacle appears 800 meters...
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...
06:35
Linearization of the Bradford Protein Assay
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Cited by 292 •
2010
The accuracy and sensitivity of protein determination by the rapid and convenient Bradford assay is compromised by intrinsic nonlinearity. We show a simple linearization procedure that greatly increases the accuracy, improves the sensitivity of the assay about 10-fold, and significantly reduces interference by detergents.
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...
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...
FAQs
The distinction depends on whether velocity remains unchanged or varies during the observation. Uniform-motion analysis tracks a consistent relationship between position and time, whereas accelerated-motion analysis accounts for changing velocity and therefore changing position behavior. Separating these cases helps students select appropriate equations, interpret graphs, and predict an object’s later position from measured motion.
Graphs display how position, velocity, or acceleration changes, while equations express the relationships among those quantities in a form that supports prediction. Comparing measured graphs with calculated values can reveal whether motion is uniform or accelerated. This combination connects observed behavior with quantitative models instead of relying on a visual description alone.
Forces provide the connection between an object’s motion and its dynamics under Newton’s laws. When motion changes, analyzing the relevant forces helps explain the associated acceleration rather than treating the acceleration as an isolated measurement. This perspective also allows linear-motion observations to be related to broader physical ideas, including energy and momentum in a system.
A typical investigation begins by observing an object such as a laboratory cart with a motion sensor. Researchers then collect motion data, represent the results with graphs, and use equations to characterize position, velocity, and acceleration. Finally, they compare the measured behavior with the expected uniform or accelerated pattern and interpret any connection to forces.
Motion sensors provide measurements that can be organized into graphs and analyzed with equations. Laboratory carts offer a practical system for observing how position changes and for distinguishing uniform from accelerated behavior. Together, these tools can provide position, velocity, and acceleration information, supporting predictions about where the object will be at a later time.
The same analysis supports the study of vehicles and mechanical devices, where researchers need to characterize trajectories and predict future positions. Measurements of position, velocity, and acceleration can be interpreted alongside forces, energy, and momentum to connect an observed path with the behavior of the larger physical system. This makes the approach useful across laboratory and engineering contexts.