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Related Concept Videos

Impulse01:13

Impulse

21.4K
According to Newton’s second law of motion, the rate of change of the momentum of an object is the net external force acting on it. The total change in momentum between two timepoints thus depends on both the external force acting on it and the time over which it acts. Describing this mathematically, the total change of an object’s motion is proportional to the force vector and the time over which it is applied. This product is called impulse.
Additionally, it can be shown that the...
21.4K
Impulse Response01:17

Impulse Response

744
The impulse response is the system's reaction to an input impulse. In an RC circuit, the voltage source is the input, and the capacitor's voltage is the output. The system's state and output response before and after input excitation are distinctly defined.
Kirchhoff's law forms an input signal equation, with the capacitor's current and voltage providing the output. Substituting the current and dividing by RC yields a differential equation. The output for an impulse input is the impulse...
744
Principle of Impulse and Moment01:15

Principle of Impulse and Moment

509
When one considers a rigid body undergoing a plane motion, which is essentially a blend of translational and rotational movement, the application of Newton's second law gives the formula for the translational movement of such a body. If this equation is multiplied by a time interval, dt, and then integrated over the limits of integration, it results in an equation that embodies the principle of linear impulse.
509
Impulse-Momentum Theorem00:49

Impulse-Momentum Theorem

19.0K
The total change in the motion of an object is proportional to the total force vector acting on it and the time over which it acts. This product is called impulse, a vector quantity with the same direction as the total force acting on the object.
By writing Newton's second law of motion in terms of the momentum of an object and the external force acting on it, and simultaneously using the definition of the impulse vector, it can be shown that the total impulse on an object is equal to its...
19.0K
Principle of Angular Impulse and Momentum01:23

Principle of Angular Impulse and Momentum

1.3K
The angular impulse and momentum principle provides insights into how forces applied at a distance from an object's rotational axis influence its angular velocity. It builds upon the crucial relationship between the moment of force and angular momentum. By integrating this equation, substituting the limits for the initial and final times, a comprehensive expression representing the angular impulse and momentum principle is derived.
1.3K
Principle of Angular Impulse and Momentum: Problem Solving01:19

Principle of Angular Impulse and Momentum: Problem Solving

498
Consider a ball of mass m, attached to a massless rod of known length, subjected to a time-dependent torque. If the initial velocity of the mass is known, then the final velocity of the mass for time t can be determined using the principle of angular impulse and momentum.
Initially, a free-body diagram of the system is drawn to illustrate all the forces acting upon the system, providing a crucial understanding of the dynamics at play. Then, the principle of angular impulse and momentum is...
498

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Related Experiment Video

Updated: Jan 26, 2026

Testing of all Six Semicircular Canals with Video Head Impulse Test Systems
08:38

Testing of all Six Semicircular Canals with Video Head Impulse Test Systems

Published on: April 18, 2019

32.7K

Video Head Impulse Testing.

Miriam S Welgampola, Rachael L Taylor, G Michael Halmagyi

    Advances in Oto-Rhino-Laryngology
    |April 5, 2019
    PubMed
    Summary
    This summary is machine-generated.

    The video head impulse test (vHIT) objectively assesses the vestibulo-ocular reflex (VOR). Combined with VEMPs, vHIT allows comprehensive vestibular end-organ evaluation in the clinic.

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    Area of Science:

    • Neurology
    • Ophthalmology
    • Audiology

    Background:

    • The bedside head impulse test is a key clinical assessment for the human vestibulo-ocular reflex (VOR).
    • The video head impulse test (vHIT) provides an objective, laboratory-based method for VOR assessment.
    • Vestibular disorders present with diverse symptoms, including vertigo and imbalance.

    Purpose of the Study:

    • To explore the clinical utility of the video head impulse test (vHIT) in common vestibular scenarios.
    • To demonstrate how vHIT, alongside vestibular evoked myogenic potentials (VEMPs), can comprehensively assess vestibular function.
    • To highlight the integration of vHIT into routine clinical practice for vestibular evaluation.

    Main Methods:

    • Utilizing the video head impulse test (vHIT) for objective VOR measurement.
    • Integrating vHIT with vestibular evoked myogenic potentials (VEMPs) for complete vestibular end-organ assessment.
    • Applying vHIT in clinical scenarios including acute vestibular syndrome, recurrent vertigo, and chronic imbalance.

    Main Results:

    • vHIT enables objective quantification of the vestibulo-ocular reflex (VOR).
    • The combination of vHIT and VEMPs allows for the assessment of all five vestibular end-organs.
    • vHIT is applicable across various clinical presentations of vestibular dysfunction.

    Conclusions:

    • The video head impulse test (vHIT) is a valuable tool for objective VOR assessment.
    • Integrating vHIT with VEMPs provides a comprehensive clinical evaluation of the vestibular system.
    • vHIT facilitates efficient and thorough vestibular assessment within a clinical setting.