Given:
Mass of the ball, m = 0.20 kg
Final velocity of the ball, v = 40 m/s
Time of contact, t = 40 ms = 40 x 10^-3 s
Using the formula for force:
\[ F = \frac{m \cdot (v_f - v_i)}{t} \]
\[ F = \frac{0.20 \cdot (40 - 0)}{40 \times 10^{-3}} \]
\[ F = \frac{0.20
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