A baseball with a mass of 0.145 kg is moving horizontally to the right with an initial velocity of 40 m/s just before the batter hits it. The ball is then struck so that, once it is no longer in contact with the bat, it is moving to the left with the same speed of 40 m/s. If the ball is in contact with the bat for 0.8 ms, and assuming a constant force, what is the magnitude of the force on the ball from the bat?

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