What is the sweet spot on a cricket bat for reducing shock to the hands?

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Discussion Overview

The discussion focuses on calculating forces acting on a cricket bat when a ball strikes it at an angle, particularly the axial force and its impact on the hands of the batter. The scope includes theoretical calculations, physiological considerations, and practical implications related to the "sweet spot" on the bat.

Discussion Character

  • Technical explanation
  • Exploratory
  • Conceptual clarification

Main Points Raised

  • One participant seeks to calculate the axial force on the bat during impact, having already determined the normal force using the impulse momentum equation.
  • Another participant suggests drawing a free body diagram (FBD) and writing equations of motion to aid in understanding the forces involved.
  • A different perspective introduces the physiological aspect, mentioning that vibrations could be significant in designing batting gloves or understanding injury causes, although the participant is uncertain about how to address this.
  • One participant references the concept of the "sweet spot," noting its location on the bat and its effect on reducing shock to the hands during impact, while also suggesting a search for more information on the topic.

Areas of Agreement / Disagreement

Participants express various interests and approaches to the problem, with no consensus reached on the calculations or the implications of the sweet spot. Multiple competing views and methods remain present in the discussion.

Contextual Notes

Limitations include the need for specific assumptions regarding impact angles and forces, as well as the dependence on definitions of terms like "sweet spot" and "axial force." The discussion does not resolve the mathematical steps necessary for the calculations proposed.

mrajkumar
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hi, could you tell me how to calculate the axial force (along the axis of the bat) on the bat, when the ball hits with some angle with respect to the bat longitudinal axis. The normal force on the bat I've calculated based on the impulse momentum equation.
I'm interested i calculating approximate force transferred to the hand. Normal as well as axial forces.
I've bat swing velocity, ball velocity.
Thank you
 
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Draw an FBD of the bat, and write the equations of motion.
 
If you're looking at this from a physiological standpoint, such as to design a batting glove or determine the cause of a fracture, vibrations will also factor in. I don't know if that matters to you or not, and I don't know what to do about it even if so.
 
mrajkumar said:
... I'm interested i calculating approximate force transferred to the hand.

Try the search term "sweet spot" ... https://www.google.com/search?q=cricket bat sweet spot physics

Also applies to other bats ...
physics.usyd.edu.au said:
Batters know from experience that there is a sweet spot on the bat, about 17 cm from the end of the barrel, where the shock of the impact, felt by the hands, is reduced to such an extent that the batter is almost unaware of the collision. At other impact points, the impact is usually felt as a sting or jarring of the hands and forearm, particularly if the impact occurs at a point well removed from the sweet spot.
http://www.physics.usyd.edu.au/~cross/baseball.html
 
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