Constant Velocity
Constant Velocity - Related Videos
07:44
Construction of Constant-Load (Isotonic) and Constant-Velocity (Isokinetic) Torque-Velocity-Power Profiles In vivo for the Rat Plantar Flexors
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2025
Here, we present a novel protocol to non-invasively measure the torque-angular velocity-power relationship in vivo in rat plantar flexors using transcutaneous muscle stimulation. This setup enables simple testing of isotonic muscle contractions on a force transducer/length controller system to better represent the constant-load nature of everyday movements.
11:23
Material Constants
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2023
Source: Roberto Leon, Department of Civil and Environmental Engineering, Virginia Tech, Blacksburg, VA In contrast to the production of cars or toasters, where millions of identical copies are made and extensive prototype testing is possible, each civil engineering structure is unique and very expensive to reproduce (Fig.1). Therefore, civil engineers must extensively rely on analytical modeling to design their structures. These models are simplified abstractions of reality and are used to...
03:02
Constant Pressure Calorimetry
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2020
Calorimetry is a technique used to measure the amount of heat involved in a chemical or physical process or to measure the heat transferred to or from a substance. The heat is exchanged with a calibrated and insulated device called the calorimeter. Calorimetry experiments are based on the assumption that there is no heat exchange between the insulated calorimeter and the external environment. The well-insulated calorimeters prevent the transfer of heat between the calorimeter and its external...
02:41
Constant Volume Calorimetry
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2020
Calorimeters are useful to determine the heat released or absorbed by a chemical reaction. Coffee cup calorimeters are designed to operate at constant (atmospheric) pressure and are convenient to measure heat flow (or enthalpy change) accompanying processes that occur in solution at constant pressure. A different type of calorimeter that operates at constant volume, colloquially known as a bomb calorimeter, is used to measure the energy produced by reactions that yield large amounts of heat and...
03:07
Kinetic Molecular Theory: Molecular Velocities, Temperature, and Kinetic Energy
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2020
The kinetic molecular theory qualitatively explains the behaviors described by the various gas laws. The postulates of this theory may be applied in a more quantitative fashion to derive these individual laws. Collectively, the molecules in a sample of gas have average kinetic energy and average speed; but individually, they move at different speeds. Molecules frequently undergo elastic collisions in which the momentum is conserved. Since the colliding molecules are deflected off at different...
FAQs
Zero acceleration means the velocity does not change from one moment to the next, so neither its magnitude nor its direction is altered. Consequently, the object’s displacement accumulates at a steady rate, and its position follows x = x₀ + vt. This condition lets physicists analyze motion without introducing a time-dependent velocity.
Constant speed fixes only how quickly an object moves, whereas constant velocity also requires an unchanging direction. An object can therefore maintain the same speed while its velocity changes if its direction changes. This distinction matters when deciding whether acceleration is zero and when interpreting motion in a physics analysis.
A position-time graph for this motion reflects a linear change in position, with equal time intervals producing equal displacements. A velocity-time graph shows that the velocity value remains unchanged over time. Using both views helps connect the object’s measured position, its velocity, and the conclusion that acceleration is zero.
Record the object’s position at regular time intervals, compare the displacement from one interval with the next, and check whether the direction remains unchanged. Equal displacements in equal intervals support the model. The relation x = x₀ + vt can then be used to describe or predict position throughout the observed motion.
It is useful when the net force is zero or when friction and other changing effects are negligible. Under those conditions, the idealized motion provides a simpler description than a model with changing velocity. Comparing observations with this assumption also indicates whether real influences are significant enough to require a more detailed analysis.
In kinematics, the model supplies a direct link between initial position, velocity, and elapsed time through x = x₀ + vt. It supports predictions of location, interpretation of motion graphs, and checks that an object covers equal displacements over equal intervals. These uses make it a foundation for analyzing uniform motion.