Object Motion
Object Motion - Related Videos
10:12
Newton's Laws of Motion
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2023
Source: Andrew Duffy, PhD, Department of Physics, Boston University, Boston, MA This experiment examines at various situations involving two interacting objects. First, the experiment examines the forces that two objects apply to one another while they collide. The objects are wheeled carts that have variable masses. The purpose of this experiment is to discover when the force the first cart exerts on the other is the same magnitude as the force the second cart exerts back on the first, as well...
05:55
Multiple Object Tracking
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2023
Source: Laboratory of Jonathan Flombaum—Johns Hopkins University In a staggeringly complex and engaging world, it is crucial to selectively process some stimuli at the expense of others. Experimental psychologists call this ability attention. Specifically, visual attention refers to the ability to selectively process aspects of a visual scene. Many paradigms used to study visual attention involve brief, punctuated, and repeated trials. However, everyday situations often place sustained demands...
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...
10:14
Object Substitution Masking
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2023
Source: Laboratory of Jonathan Flombaum—Johns Hopkins University Visual masking is a term used by perceptual scientists to refer to a wide range of phenomena in which in an image is presented but not perceived by an observer because of the presentation of a second image. There are several different kinds of masking, many of them relatively intuitive and unsurprising. But one surprising and important type of masking is called Object Substitution Masking. It has been a focus of research in vision...
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
Choosing a reference frame is essential because position is reported relative to it. The same object can therefore receive different motion descriptions when the observer or coordinate viewpoint changes. In an Object Motion analysis, stating the reference frame first makes displacement, velocity, and acceleration comparisons consistent and prevents ambiguity when interpreting a trajectory.
Uniform and accelerated motion are distinguished by whether velocity remains unchanged or changes over time. Because velocity describes position change and acceleration describes velocity change, examining both quantities reveals whether an object follows a steady pattern or a changing one. This distinction helps organize trajectory analysis and supports predictions of position under specified conditions.
Forces matter because they provide a physical explanation for changes in motion. Newton’s laws connect those force effects with an object’s behavior, allowing an analysis to move beyond describing a trajectory to examining why the trajectory changes. Including forces is especially useful when predicting motion in a system whose conditions are specified.
A basic workflow begins by selecting a reference frame and identifying the relevant positions and time interval. The analyst then describes displacement, velocity, and acceleration, checks whether motion is uniform or accelerated, and considers applicable forces through Newton’s laws. This sequence organizes the information needed to interpret a trajectory and predict position.
Object Motion analysis supports models of projectiles and vehicles by linking changes in position to velocity and acceleration. For a trajectory, these quantities help describe how the object travels and whether its motion changes. The resulting model can be used to predict position, making the approach useful in mechanics and engineering.
The same framework extends across very different physical scales. Planetary motion can be interpreted through trajectories, velocity, acceleration, and forces, while molecular motion provides another setting for applying motion concepts. This broad use shows why Object Motion serves as a foundation in physics: it connects abstract quantities with the behavior of physical systems.