Enhancing Ball Mass in Air Jet Experiments: Tips and Techniques

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Discussion Overview

The discussion revolves around enhancing the mass of a ball used in air jet experiments while maintaining a consistent air jet velocity. Participants explore methods to increase the mass of a Ping-Pong ball, consider alternative ball types, and discuss the implications of mass on the height achieved by the ball in the air jet.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant suggests using paint to increase the mass of a Ping-Pong ball, while acknowledging that this may alter the ball's diameter.
  • Another participant proposes using hollow spheres and varying the internal diameter as an alternative method to increase mass without changing the external diameter.
  • A participant inquires about the use of a squash ball, speculating that it might gain less height than the Ping-Pong ball due to its greater mass.
  • There is a discussion about the equation F=ma to describe the relationship between mass and height, with a focus on how increased mass affects downward force while upward force remains constant if diameters are equal.
  • Participants express curiosity about other types of balls that could be used, emphasizing the importance of maintaining equal diameter for accurate comparisons.

Areas of Agreement / Disagreement

Participants present multiple competing views on how to increase the mass of the ball and the implications of using different types of balls. The discussion remains unresolved regarding the best approach and the effects on experimental outcomes.

Contextual Notes

There are limitations regarding the assumptions made about the effects of mass on height, as well as the dependence on the definition of diameter when considering different ball types.

Who May Find This Useful

Researchers and students involved in experimental physics, particularly those interested in fluid dynamics and the behavior of objects in air jets.

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Monitoring the height a ball gains in an air jet.

Using Ping-Pong Balls and I'd like to keep the air jet velocity (20ms) while varying the mass of the ball.

The ball is currently 2g, I'm looking to add another gram to this figure. I thought about paint, does anybody have any other suggestions ?

I'm aware that this will possibly disregard the results acheived with the ball measured at 40mm diameter because paint will increase the diameter but I can't think of other methods that could increase mass without varying diameter.

[?]
 
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Use hollow sphere's and vary the ID.

JMD
 
ID ?
 
Internal diameter.

cookiemonster
 
ta :)
 
I suppose I could also use a squash ball, I'd imagine a 20ms air jet will provide enough upward force to allow the ball to gain and maintain a height.

I'd expect the squash ball to gain less height than the ping pong ball. What equation could I use to describe this height difference?

F=ma ? Assuming both balls had the same diameter the upward force acting on both the balls would be equal but obviously the downward force will increase due to more mass ?

Also any other ideas for balls to be used? Its surely very important that the different balls have an equal diameter?
 

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