What is the rebound height of a ball?

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    Ball Height Rebound
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Discussion Overview

The discussion revolves around calculating the rebound height of a ball based on its initial velocity, mass, and efficiency, while considering gravitational effects. Participants explore the implications of the given parameters and seek clarification on the problem's setup.

Discussion Character

  • Homework-related, Technical explanation, Debate/contested

Main Points Raised

  • One participant asks how to calculate the rebound height of a ball given its upward velocity (v), mass (m), and a coefficient of restitution of 60%, while simplifying gravity to 10.
  • Another participant questions the clarity of the problem, noting that the scenario of a ball moving upward and then bouncing is ambiguous without context (e.g., what it is bouncing off of).
  • A participant seeks a suitable hypothesis for the rebound height of a tennis ball, indicating a need for a theoretical framework.
  • Multiple participants express the need for more information to solve the problem, with one assuming a coefficient of restitution of 0.6 and questioning the meaning of gravity being "10".
  • One participant suggests that if velocity is v at height h=0, it may be possible to calculate height using equations of motion or energy conservation principles.

Areas of Agreement / Disagreement

Participants generally agree that more information is needed to solve the problem, and there are multiple competing views regarding the interpretation of the parameters provided.

Contextual Notes

Limitations include unclear definitions of terms such as "efficiency" and "gravity," as well as the lack of context for the bouncing scenario. The assumptions regarding the coefficient of restitution and the conditions under which the ball is bouncing remain unresolved.

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If I have the velocity an object is moving up (lets make it v here), and the mass (m), how do I calculate the height it bounces to, and by using the efficiency of the ball 60% and gravity as 10 (for simplicity), how do i calculate the original height? Assume there is no wind resistance.
 
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Hi, Radio.
Is this a homework question? If so, it's in the wrong section. Anyhow, there is not enough information given to solve the problem. For one thing, how do you expect a ball that's already moving upward to "bounce"? Off of the ceiling? Off of a wall? Off of a tennis racquet? What do you mean by the "efficiency" of the ball? Gravity is 10 what? That's not even a form in which gravity can be expressed (unless you mean 10xEarth gravity).
 
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what is a suitable hypothesis for the height of rebound of a tennis ball
 
Need more information to solve. I assume coefficient of restitution is 0.6. I also don't understand gravity is 10.
 
mechpeac said:
Need more information to solve. I assume coefficient of restitution is 0.6. I also don't understand gravity is 10.
10 ms-2? If you assume velocity is v at h=0 there is enough information to calculate height using either equations of motion or energy conservation.
 

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