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

The acceleration of a brick when lifted by 42N is a. The acceleration of the same brick lifted by 52N is 2a. What is the weight of the brick?

2. Relevant equations

Fg=mg

Fapp=ma

3. The attempt at a solution

I don't really know where to start, here's what I've done so far:

W=mg

Fapp=ma, m=F/a

W=(F/a)g

W=((42N)(9.81m/s[tex]^{2}[/tex]))/a

W((52N)(9.81m/s[tex]^{2}[/tex]))/2a

hopefully that's a good start. thanks

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# Homework Help: Using Laws of Motion

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