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Related Concept Videos

Kinematic Equations - I01:26

Kinematic Equations - I

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When an object moves with constant acceleration, the velocity of the object changes at a constant rate throughout the motion. The kinematic equations of motions are derived for such cases where the acceleration of the object is constant. The first kinematic equation gives an insight into the relationship between velocity, acceleration, and time. We can see, for example:
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Kinematic Equations - II01:17

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The second kinematic equation expresses the final position of an object in terms of its initial position, the distance traveled with the initial constant velocity, and the distance traveled due to a change in velocity. Similar to the first kinematic equation, this equation is also only valid when the acceleration is constant throughout the motion of an object.
Suppose a car merges into freeway traffic on a 200 m long ramp. If its initial velocity is 10 m/s and it accelerates at 2 m/s2, then the...
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Kinematic Equations for Rotation01:30

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In mechanics, when one observes a rigid body in rotational motion with constant angular acceleration, it is possible to establish equations for its rotational kinematics. This process resembles how linear kinematics are dealt with in simpler motion studies.
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Hand hygiene01:23

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Asepsis is the practice of preventing or breaking the chain of infection. The nurse employs aseptic techniques to prevent the spread of microorganisms and reduce the risk of diseases. Hand hygiene is the cornerstone of aseptic techniques and is classified into medical and surgical asepsis. Medical asepsis includes hand hygiene and the use of gloves. Surgical asepsis, or the sterile technique, refers to practices that render and keep objects and areas free of microorganisms.
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Kinematic Equations - III01:18

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The first two kinematic equations have time as a variable, but the third kinematic equation is independent of time. This equation expresses final velocity as a function of the acceleration and distance over which it acts. The fourth kinematic equation does not have an acceleration term and provides the final position of the object at time t in terms of the initial and final velocities. This equation is useful when the value of the constant acceleration is unknown.
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Kinematic Equations: Problem Solving01:15

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When analyzing one-dimensional motion with constant acceleration, the problem-solving strategy involves identifying the known quantities and choosing the appropriate kinematic equations to solve for the unknowns. Either one or two kinematic equations are needed to solve for the unknowns, depending on the known and unknown quantities. Generally, the number of equations required is the same as the number of unknown quantities in the given example. Two-body pursuit problems always require two...
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Related Experiment Video

Updated: Jan 21, 2026

Functional MRI in Conjunction with a Novel MRI-compatible Hand-induced Robotic Device to Evaluate Rehabilitation of Individuals Recovering from Hand Grip Deficits
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Hand Function Kinematics when using a Simulated Myoelectric Prosthesis.

Heather E Williams, Quinn A Boser, Patrick M Pilarski

    IEEE ... International Conference on Rehabilitation Robotics : [Proceedings]
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    Summary
    This summary is machine-generated.

    This study found that simulated prosthetic hand movements in non-disabled individuals showed slower task completion and altered movement patterns compared to natural hand function. These findings are crucial for understanding myoelectric prosthesis control research.

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    Area of Science:

    • Biomechanics
    • Rehabilitation Engineering
    • Human Movement Science

    Background:

    • Myoelectric prosthesis control research often uses simulated devices on non-disabled individuals.
    • This approach assumes simulated movements accurately reflect actual prosthesis user function.
    • Validating this assumption is key for interpreting research findings.

    Purpose of the Study:

    • To quantify movement performance differences between simulated transradial myoelectric prosthesis hand function and normative hand function.
    • To assess the validity of using non-disabled participants with simulated devices in myoelectric prosthesis research.
    • To establish a baseline for comparing simulated versus actual prosthesis user performance.

    Main Methods:

    • Utilized motion capture technology to record hand kinematics.
    • 12 non-disabled participants performed an object-manipulation task with a simulated transradial myoelectric prosthesis.
    • Compared kinematic data and performance metrics against 20 non-disabled individuals using their intact hand.

    Main Results:

    • Simulated prosthesis users exhibited slower task performance compared to the normative group.
    • End effector velocity profiles showed multiple peaks in simulated users.
    • Grip aperture demonstrated a plateau during object grasping in simulated users.

    Conclusions:

    • Simulated transradial myoelectric prosthesis hand function differs significantly from normative hand function.
    • The study confirms expectations of slower, less smooth movements with simulated devices.
    • Further research is recommended to directly compare actual myoelectric prosthesis users with normative data.