Rotational kinematics check please.

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Homework Help Overview

The discussion revolves around a problem involving rotational kinematics, specifically analyzing the motion of an electric turntable with given initial angular velocity and constant angular acceleration. Participants are tasked with calculating angular velocity, revolutions, tangential speed, and resultant acceleration over a specified time interval.

Discussion Character

  • Mixed

Approaches and Questions Raised

  • Participants explore various calculations for angular velocity, revolutions, tangential speed, and resultant acceleration. There are attempts to clarify the use of angular acceleration and its conversion to appropriate units. Some participants express uncertainty about their calculations and seek verification of their results.

Discussion Status

The conversation includes several attempts to check and verify calculations, with some participants questioning their understanding of the concepts and the correctness of their mathematical approaches. Guidance has been offered regarding unit conversions and the importance of consistent units in calculations.

Contextual Notes

There is an ongoing discussion about the necessity of converting angular measurements from revolutions to radians to ensure accurate calculations. Participants are also addressing potential computational errors and the implications of using incorrect units in their results.

  • #31
θ=ω_0 t+1/2 αt^2 then n=theta/2pi

θ=0.5*pi*0.2+.5*1.8*pi*.04=pi(0.1+0.036)=0.136*pi

θ/2*pi=0.136*pi/2*pi=0.136/2=0.068 rev
 
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  • #32
Hey, i now have what you have, i subbed w at .2s in instead of w_0. thanks for all of your help.
 

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