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I'm just working some practice problems, and I can't think of any examples for these two questions. Any help?

1. The problem statement, all variables and given/known data

Give a specific example of a situation in which:

[tex]W_{ext}\rightarrow E_{th}[/tex] with [tex]\Delta K=0,[/tex] and [tex]\Delta U=0.[/tex]

[tex]U\rightarrow E_{th}[/tex] with [tex]\Delta K=0,[/tex] and [tex]W_{ext}=0.[/tex]

2. Relevant equations

K-f + U_f + Delta E_th = K_i + U_i + W_ext

3. The attempt at a solution

I'm trying to find examples of these situations... any help?

Thanks!

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# Homework Help: Conservation of Energy

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