Center Seeking
Center Seeking - Related Videos
08:39
Operant Sensation Seeking in the Mouse
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Cited by 26 •
2010
In this protocol we describe a method of operant learning using sensory stimuli as a reinforcer in the mouse. It requires no prior training or food restriction, and it allows the study of motivated behavior without the use of a pharmacological or natural reinforcer such as food.
08:05
A Procedure to Study Stress-Induced Relapse of Heroin Seeking after Punishment-Imposed Abstinence
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Cited by 3 •
2022
A procedure that demonstrates a robust acute food deprivation-induced relapse to heroin seeking after punishment-imposed abstinence is described. A punishment-imposed abstinence model was successfully implemented using the seek and take chain schedule for heroin self-administration. Heroin-seeking tests are then performed following 24 h of food-deprivation stress.
10:35
A Procedure to Study the Effect of Prolonged Food Restriction on Heroin Seeking in Abstinent Rats
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Cited by 11 •
2013
A procedure that allows a demonstration of robust augmentation of drug seeking in food-restricted rats is described. Following heroin self-administration training, rats go through an abstinence period, in a drug-free environment, during which they are mildly food restricted. Drug seeking is then tested in the drug-associated environment.
02:33
Lattice Centering and Coordination Number
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2020
The structure of a crystalline solid, whether a metal or not, is best described by considering its simplest repeating unit, which is referred to as its unit cell. The unit cell consists of lattice points that represent the locations of atoms or ions. The entire structure then consists of this unit cell repeating in three dimensions. The three different types of unit cells present in the cubic lattice are illustrated in Figure 1. Types of Unit Cells Imagine taking a large number of identical...
08:54
A Procedure for Studying the Footshock-Induced Reinstatement of Cocaine Seeking in Laboratory Rats
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Cited by 14 •
2011
Animal models of relapse, known as reinstatement procedures, have been used extensively to study the role of stress in relapse to drug seeking. Here, we report on a method for inducing the reinstatement of cocaine seeking in laboratory rats via acute exposures to mild, intermittent electric footshock.
FAQs
The inward acceleration continuously changes the direction of an object’s velocity, so the object follows a curved or circular path. This distinction matters because acceleration does not only describe changes in speed; it also describes changes in velocity direction. Analyzing the direction of the net force therefore helps explain how an object turns while moving through a rotating or curved system.
The required inward force does not represent a separate type of force. Gravity can guide an orbit, tension can pull an attached object toward a center, friction can help a vehicle follow a curve, and a normal force can redirect motion through contact. Identifying the actual source is essential for connecting the motion model to the physical system being studied.
The required force follows F = mv²/r, so increasing mass increases the force proportionally, while increasing speed has a stronger effect because speed is squared. Increasing the radius reduces the required force when mass and speed remain unchanged. These relationships allow physicists to predict how changing an object’s motion or path affects the force needed to maintain it.
First identify the fixed center and determine the direction of the net force or acceleration. Next establish the object’s mass, speed, and path radius, then apply F = mv²/r to find the required force or an unknown quantity. Finally, determine whether gravity, tension, friction, or a normal force provides that inward contribution in the specific system.
Centrifuges rely on inward-directed force and acceleration to describe motion around a rotating center, while vehicles require an appropriate inward force to move through curves. In both cases, the relationship among speed, radius, and force helps explain how changing operating conditions affects motion. The same framework supports practical analysis of rotating equipment and curved travel.
In planetary orbits, gravity can provide the inward force associated with curved motion, making center-seeking analysis a foundation for orbital dynamics. The framework also connects force, speed, and radius, which helps physicists examine whether a rotating or orbiting system maintains its intended motion. These relationships contribute to broader investigations of stability in gravitational and rotating systems.