HES307 Set04 Lecture-audio

Main Concepts: Impulse and Momentum

• Impulse relates to activities involving high forces applied over short durations (e.g., throwing, striking, kicking).

• Linear impulse is connected with high impact situations.

• Momentum is about changing an object's velocity and is crucial in sports dynamics.

Problematic Questions from Exam One

• Focused on the bicep curl kinematics in vertical and horizontal directions.

• Importance of understanding force application during the biceps curl.

Vertical Kinematics

• Vertical direction is simpler but essential for understanding overall biomechanics.

• Key points in acceleration and velocity:

  • Begin: zero velocity, positive acceleration.

  • Peak: zero velocity, transition from positive to negative acceleration.

  • Down phase: zero velocity, negative acceleration.

Horizontal Kinematics

• More complex than vertical aspects but critical for accurate analysis.

• Key points include:

  • Beginning: positive forward velocity.

  • Midway: zero instantaneous acceleration, transitioning from forward to backward motion.

  • End: returning to zero velocity, further negative acceleration.

Quiz Insights

• Issues with recognizing horizontal acceleration during different phases of the biceps curl:

  • Expectation of negative instantaneous acceleration at the midway point of the upward phase.

  • Average horizontal acceleration question on the down phase similarly reflects the values seen in the up phase.

• Emphasis on remembering the zero values at critical transition points for both directions (up and down phases).

Conclusion

• Reinforcement of themes covered in class as foundational for upcoming assessments and practical applications in sports science.