How to Calculate Impulse and Average Force in a Baseball Bat Collision

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SUMMARY

The discussion focuses on calculating the impulse and average force exerted on a baseball during a collision with a bat. The baseball, weighing 0.137 kg, reverses its velocity from +21.9 m/s to -21.9 m/s, resulting in an impulse of 0.0060006 kg·m/s. The average force exerted by the bat on the baseball, given a contact time of 1.45 ms, is calculated to be 4.14 N. A common error identified in the calculations was the incorrect conversion of velocity units.

PREREQUISITES
  • Understanding of impulse and momentum principles
  • Familiarity with the equations P=m(vf-vi) and F=delta p/delta t
  • Basic knowledge of unit conversions in physics
  • Experience with solving physics problems involving collisions
NEXT STEPS
  • Review the concept of impulse and its applications in collision scenarios
  • Study the derivation and application of the impulse-momentum theorem
  • Learn about unit conversions and common pitfalls in physics calculations
  • Explore real-world examples of forces in sports physics
USEFUL FOR

This discussion is beneficial for physics students, educators, and anyone interested in understanding the dynamics of collisions in sports, particularly in baseball mechanics.

Vanessa23
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[SOLVED] baseballs and impulses

Homework Statement



A 0.137-kg baseball traveling horizontaly is hit by a bat and its direction is exactly reversed. Its velocity changes from +21.9 m/s to -21.9 m/s. What is the magnitude of the impulse delivered by the bat to the ball (enter first). If the baseball is in contact with the bat for 1.45 ms, what is the average force exerted by the bat on the ball?

Homework Equations



P=m(vf-vi) and F=delta p/delta t

The Attempt at a Solution



p=.137(.0219-(-.0219))
p=.0060006 Part1 answer

F=.0060006/.00145s
F=4.14

However, the program we submit our answers to says that one or both of my answers is wrong. Please help!
 
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Vanessa23 said:
p=.137(.0219-(-.0219))
p=.0060006 Part1 answer
You changed 21.9 to 0.0219!
 
wow. I guess I got a little carried away converting units. Thanks!
 

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