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Related Concept Videos

Kinematic Equations for Rotation01:30

Kinematic Equations for Rotation

770
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.
For instance, imagine a point A on a rigid body engaged in circular motion. The translational velocity of this particular point can be calculated by taking the time derivatives of the displacement equation, which essentially measures the...
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Relative Motion Analysis using Rotating Axes - Acceleration01:22

Relative Motion Analysis using Rotating Axes - Acceleration

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Consider a component AB undergoing a linear motion. Along with a linear motion, point B also rotates around point A. To comprehend this complex movement, position vectors for both points A and B are established using a stationary reference frame. The absolute velocity of point B is determined by adding the absolute velocity of point A, the relative velocity of point B in the rotating frame, and the effects caused by the angular velocity within the rotating frame.
Time differentiation is...
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Mesh Analysis with Current Sources01:10

Mesh Analysis with Current Sources

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Mesh analysis becomes simpler when analyzing circuits with current sources, whether independent or dependent. The presence of current sources reduces the number of equations required for analysis. Two cases illustrate this:
Current Source in One Mesh: The analysis process is straightforward when a current source is found in only one mesh within the circuit. Mesh currents are assigned as usual, with the mesh containing the current source excluded from the analysis. Kirchhoff's voltage law...
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Relative Motion Analysis using Rotating Axes01:25

Relative Motion Analysis using Rotating Axes

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Consider a component AB undergoing a linear motion. Along with a linear motion, point B also rotates around point A. To comprehend this complex movement, position vectors for both points A and B are established using a stationary reference frame.
However, to express the relative position of point B relative to point A, an additional frame of reference, denoted as x'y', is necessary. This additional frame not only translates but also rotates relative to the fixed frame, making it...
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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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Relative Motion Analysis using Rotating Axes-Problem Solving01:29

Relative Motion Analysis using Rotating Axes-Problem Solving

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Consider a crane whose telescopic boom rotates with an angular velocity of 0.04 rad/s and angular acceleration of 0.02 rad/s2. Along with the rotation, the boom also extends linearly with a uniform speed of 5 m/s. The extension of the boom is measured at point D, which is measured with respect to the fixed point C on the other end of the boom. For the given instant, the distance between points C and D is 60 meters.
Here, in order to determine the magnitude of velocity and acceleration for point...
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Related Experiment Video

Updated: Jan 21, 2026

Comparative Analysis of Lower Limb Kinematics between the Initial and Terminal Phase of 5km Treadmill Running
08:26

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Rotational shot put: a phase analysis of current kinematic knowledge.

Michael Schofield1, John B Cronin1, Paul Macadam1

  • 1Sports Performance Research Institute New Zealand (SPRINZ) at AUT Millennium, Auckland University of Technology, Auckland, New Zealand.

Sports Biomechanics
|August 2, 2019
PubMed
Summary

Coaches can improve shot put performance by focusing on the athlete-shot system

Keywords:
Throwingkinematicskineticsrotation

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Area of Science:

  • Sports Biomechanics
  • Athletic Performance Analysis
  • Track and Field Dynamics

Background:

  • Rotational shot put performance relies on maximizing release distance and velocity.
  • Coaches seek to enhance throwing performance through biomechanical analysis.
  • Understanding key kinematic variables is essential for optimizing the shot put technique.

Purpose of the Study:

  • To review and summarize critical kinematic variables in the six phases of rotational shot put.
  • To identify biomechanical factors influencing shot put performance and release velocity.
  • To provide evidence-based insights for coaching shot put techniques.

Main Methods:

  • A narrative review of scientific literature was conducted.
  • Databases were searched using keywords: 'shot put', 'biomechanics', and 'track and field throwing'.
  • Twenty articles meeting specific inclusion criteria were analyzed.

Main Results:

  • High transverse thrower-shot angular momentum and translation path are crucial for performance.
  • Well-timed sweep leg and arm actions are vital for achieving high angular momentum.
  • Momentum development and transference across all phases generate high release velocities.

Conclusions:

  • Coaches should consider the interdependence of kinematics and kinetics across all phases of the shot put.
  • Optimizing biomechanical changes requires understanding preceding phases.
  • Further research into kinetics and energy transfer will enhance kinematic insights for coaching.