Bowling ball with air resistance problem

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Homework Help Overview

The problem involves determining the mass of a bowling ball given its terminal speed and diameter, within the context of forces acting on objects in motion through air, particularly focusing on air resistance.

Discussion Character

  • Exploratory, Assumption checking, Conceptual clarification

Approaches and Questions Raised

  • The original poster attempts to relate the gravitational force to mass but expresses uncertainty about how to proceed with the diameter information. Some participants question the relationships between terminal speed, size, and density of the object, as well as properties of air.

Discussion Status

Participants are exploring the concepts of air drag and its dependence on various factors, including speed and shape. A hint regarding the nature of drag force and its relationship to the object's size has been provided, suggesting a productive direction for further inquiry.

Contextual Notes

There is a mention of limited information provided in the problem, which may affect the discussion and approaches taken.

stangeroo
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A 22-cm-diameter bowling ball has a terminal speed of 85m/s. What is its mass.

I get F=M(9.8). But then i don't know where to go from there or what to do with the 22 cm diameter :confused:
 
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What relationships do you know between terminal speed and the size and density of an object, and/or properties of air?
 
OlderDan said:
What relationships do you know between terminal speed and the size and density of an object, and/or properties of air?
nothing, that is the only info givin.
 
I believe Dan was asking about what you know (or should know) about air drag and what affects it. :smile:

Here's a hint to get you started: For high speed objects traveling through air, the drag force is proportional to the speed squared and depends on the shape of the object (treat the ball as a sphere). Look up quadratic drag.

Edit: The drag also depends on the size of the object; that's where the diameter comes in.
 
Last edited:

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