The action is you impart energy to the bat, it is stored energy.
When the bat and ball connect, some of this energy is transferred to the ball.
The ball rebounds from the bat using the energy already given it by the pitcher, plus the extra energy above this that the bat can supply, depending on its mass and speed.
The remaining energy imparted by you to the bat must then be absorbed by you in your follow through action.
The action is the bat hitting the ball. The reaction is the ball changing in velocity and direction.
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The reaction is the ball hits the bat with equal force, in the opposite direction.
The action is you impart energy to the bat, it is stored energy.
When the bat and ball connect, some of this energy is transferred to the ball.
The ball rebounds from the bat using the energy already given it by the pitcher, plus the extra energy above this that the bat can supply, depending on its mass and speed.
The remaining energy imparted by you to the bat must then be absorbed by you in your follow through action.
The action is the bat hitting the ball. The reaction is the ball changing in velocity and direction.