Answer by ReasonMeThis for Very interesting case, where energy is not conserved?
You are right to be perplexed: the problem is either poorly thought-out or, as the other answer suggests, poorly phrased. The situation described in the problem is basically impossible or, rather, only...
View ArticleAnswer by Chemomechanics for Very interesting case, where energy is not...
The problem seems poorly worded; the intended meaning appears to be that the particle comes to rest with respect to the disc after impact.The initial momentum is $mv$. Linear momentum is conserved, so...
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Very interesting case, where energy is not conserved?
This is not a homework problem. I have a bigger, more conceptual doubt behind it.Applying linear momentum conservation: We get velocity of disc is v (towards right)Now, friction will also apply a...
View ArticleAnswer by KDP for Very interesting case, where energy is not conserved?
Let's assign some new variables so that we can determine the more general case.Let:u = the initial velocity of the particle.v = the final velocity of the disk.m = mass of the particle.M = mass of the...
View ArticleAnswer by Andrew Steane for Very interesting case, where energy is not...
Your analysis is correct. The initial energy in the system of particle plus disc is the kinetic energy of the particle, $(1/2) m v^2$. The final energy in the system of particle plus disc is the...
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