COLLISION
Close to where the point of percussion occurs is the
“sweet spot.” According to a
study done by H. Brody at the Physics Department of the University of
Pennsylvania, “A bat of mass M and with initial velocity zero can be treated
as a free-body that is hit by a ball whose momentum changes due to
the interaction.” At the time of percussion the bat will oscillate which indicates
a transferal of kinetic energy into vibrational energy and some kinetic energy is lost.
When all this occurs it is an extremely aggressive action. The bat has a
massive force on the ball changing the direction and speed.
study done by H. Brody at the Physics Department of the University of
Pennsylvania, “A bat of mass M and with initial velocity zero can be treated
as a free-body that is hit by a ball whose momentum changes due to
the interaction.” At the time of percussion the bat will oscillate which indicates
a transferal of kinetic energy into vibrational energy and some kinetic energy is lost.
When all this occurs it is an extremely aggressive action. The bat has a
massive force on the ball changing the direction and speed.
www.kettering.edu/~drussel/bats-new/batvibers.html
The definitions of the “sweet spot”
- A position that generates the least amount of vibrational sensation or “sting”
- A position that generates the maximum ball speed
- Center of percussion (COP)
- A position where utmost energy is transferred to the ball
- A position where coefficient of restitution is utmost
- A node of the fundamental vibrational mode
- A position between nodes of the first two vibrational modes
| Introduction |
Vibration |
Equations |
References |
