Ap physics at my highschool gave me a hard question

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A baseball with a mass of 0.14 kg is pitched at 46 m/s, and a bat exerts an average force of 8900 N for 2.1 ms. The discussion highlights the concept of impulse, defined as the change in momentum, and its formula: F * Δt = m * Δv. Participants emphasize that Δv represents the change in velocity rather than the velocity itself. The problem is deemed straightforward, assuming the ball returns in the opposite direction after being hit. Understanding impulse and momentum is crucial for solving such physics problems effectively.
chyle
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A baseball has a mass of about 0.14 kg, and it is pitched towards home plate at a speed of about 46 m/s. If the bat exerts an average force of 8900 N for 2.1 ms, what is the final speed of the ball in m/s?
 
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Do you know what is the impulse of a force? Impulse = change in momentum. Using that, this is definitely a very easy problem. Of course, we have to assume that the ball went back right the way it came.
 
Impuls and change of momentum

F *\Deltat = m * \Deltav

\Deltav is the change in velocity that you have, not the velocity by itself, but you probably know that :)
 
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