Translational Motion
Translational Motion - Related Videos
02:33
Initiation of Translation
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2020
Initiating translation is complex because it involves multiple molecules. Initiator tRNA, ribosomal subunits, and eukaryotic initiation factors (eIFs) are all required to assemble on the initiation codon of mRNA. This process consists of several steps that are mediated by different eIFs. First, the initiator tRNA must be selected from the pool of elongator tRNAs by eukaryotic initiation factor 2 (eIF2). The initiator tRNA (Met-tRNAi) has conserved sequence elements including modified bases at...
01:44
Termination of Translation
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2020
The large ribosomal subunit has several important structures essential to translation. These include the peptidyl transferase center (PTC) - which is the site where the peptide bond is formed - and a large, internal, water-filled tube through which the nascent polypeptide moves. This latter structure is called the Peptide Exit Tunnel, and it begins at the PTC and spans the body of the large ribosomal subunit. During translation, as the nascent polypeptide chain is synthesized, it passes through...
02:07
Improving Translational Accuracy
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2020
Base complementarity between the three base pairs of mRNA codon and the tRNA anticodon is not a failsafe mechanism. Inaccuracies can range from a single mismatch to no correct base pairing at all. The free energy difference between the correct and nearly correct base pairs can be as small as 3 kcal/ mol. With complementarity being the only proofreading step, the estimated error frequency would be one wrong amino acid in every 100 amino acids incorporated. However, error frequencies observed in...
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
A net force produces a change in an object’s linear velocity, which means the object’s motion can change in speed, direction, or both. This relationship provides the central link between forces and acceleration in translational analysis. Applying Newton’s laws allows researchers to explain how an object responds when the combined effect of forces is not balanced.
The path identifies whether the motion is rectilinear or curvilinear. Rectilinear motion follows a straight path, whereas curvilinear motion follows a curved one. This distinction helps organize the description of displacement, velocity, and acceleration, while still allowing the same translational framework to be applied to objects whose paths differ.
Unchanged orientation indicates that the analysis concerns movement of the object through space without a change in how the object is directed. This condition separates translational behavior from motion that includes reorientation. Keeping the orientation condition explicit helps clarify which aspects of an object’s movement should be described through linear displacement, velocity, and acceleration.
Displacement describes the change in position over an interval, velocity describes the associated linear motion, and acceleration describes how that velocity changes. Considering these quantities together provides a structured way to connect an observed movement with the forces producing it. The resulting description supports prediction of how an object will respond under Newton’s laws.
Analysis can show how applied forces produce changes in linear velocity and how those changes develop over a given interval. Describing the motion with displacement, velocity, and acceleration turns an observed movement into information that can be explained through Newton’s laws. This approach helps researchers predict the resulting motion rather than only record the object’s position.
The principles support analysis across mechanics, engineering design, transportation, robotics, and studies of everyday motion. In each setting, researchers can relate an object’s displacement, velocity, and acceleration to the forces acting on it. This provides a common framework for examining motion along straight or curved paths and for predicting how objects respond to applied forces.