Calculating Distance Dropped of Horizontally Thrown Ball

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SUMMARY

The discussion focuses on calculating the vertical distance a horizontally thrown baseball drops due to gravity while traveling towards home plate. The pitcher throws the ball at a speed of 135 km/h (converted to 37.5 m/s) over a distance of 18.3 m. The time of flight is calculated to be 0.488 seconds, leading to a drop of approximately 1.166 meters. The negative sign in the final answer indicates the direction of the drop, confirming the correct application of the physics equations involved.

PREREQUISITES
  • Understanding of basic kinematics, specifically projectile motion.
  • Familiarity with the equations of motion, particularly y = voy*t + 1/2(-g)t².
  • Ability to convert units, specifically from km/h to m/s.
  • Knowledge of gravitational acceleration, typically approximated as 9.81 m/s².
NEXT STEPS
  • Study the principles of projectile motion in introductory physics textbooks.
  • Learn about the effects of air resistance on projectile trajectories.
  • Explore more complex problems involving two-dimensional motion.
  • Investigate coordinate systems and their impact on physics problem-solving.
USEFUL FOR

This discussion is beneficial for students studying introductory physics, particularly those focusing on kinematics and projectile motion. It is also useful for educators seeking to clarify concepts related to horizontal projectile motion and gravitational effects.

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Homework Statement



A pitcher throws horizontally a fast ball at 135 km/h toward home plate, which is 18.3 m away. Neglecting air resistance (not a good idea if you are the batter), find how far the ball drops because of gravity by the time it reaches home plate.


Homework Equations



vox = vo
y = voy*t+1/2(-g)t2

The Attempt at a Solution



First I changed km/h to m/s and got 37.5. Then I found t and got 0.488s. Then I plugged it into the equation above and got 1.166. It was wrong though. Should it be negative or did I do it wrong?
 
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Hello. I'll preface my response here by saying that you'll probably get more replies to this type of problem if you post in the introductory physics forum. Advanced physics is usually, but not limited to, upper level undergraduate questions.

Yes, your answer should be negative based on the coordinate system you've made. Even the math says it will be negative.
 
thank you!
 

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