The average force the bat exerts on the ball when it touches it for the given period of time is 975 N.
The given parameters:
The average force the bat exerts on the ball when it touches it for the given period of time is calculated by applying Newton's second law as follows;
[tex]F = ma\\\\F = \frac{M(v_2 - v_1)}{t} \\\\F = \frac{0.065(35 - (-25))}{4 \times 10^{-3}} \\\\F = \frac{0.065(35 + 25)}{4 \times 10^{-3}} \\\\F = 975 \ N[/tex]
Thus, the average force the bat exerts on the ball when it touches it for the given period of time is 975 N.
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