Calculating Average Force on a Bouncing Steel Ball

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Homework Help Overview

The problem involves calculating the average force exerted on a steel ball that bounces off a wall after striking it at an angle. The context includes concepts from mechanics, specifically relating to momentum and impulse.

Discussion Character

  • Exploratory, Mathematical reasoning, Assumption checking

Approaches and Questions Raised

  • The original poster attempts to apply the impulse-momentum theorem and considers the change in momentum over time. Some participants question the approach and suggest looking into specific components of momentum.

Discussion Status

The discussion is progressing with some participants providing guidance on relevant concepts. The original poster has made progress by calculating the change in momentum, indicating a productive direction in the exploration of the problem.

Contextual Notes

There may be assumptions regarding the angle of incidence and the nature of the collision, as well as the time of contact with the wall, which are under discussion but not fully resolved.

Gammage
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A 9 kg steel ball strikes a wall with a speed of 10 m/s at an angle of 49.8 degrees with the normal to the wall. It bounces off with the same speed and angle. If the ball is in contact with the wall for .0911 sec, what is the magnitude of the average force exerted on the ball by the wall?

KE = 1/2 m v^2 p = mv

I wasn't sure how to tackle this one, I made a few attempts but to no avail. Can anyone learn me up a bit.
 
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Look up the impulse-momentum theorem.
 
Thanks, that helped a lot. I found the change in the x component of the momentum then divided by the time.
 
That sounds good to me. :smile:
 

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