(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

• If we add a third block, leaving the 10 N force the

same, what happens to f3,

the net force on the 3 kg

block?

A. Increase

B. Decrease

C. Stay the Same

D. Not Enough Info.

2. Relevant equations

F net = m * a

3. The attempt at a solution

Ignore the colors in the attachment. All that matters are the numbers.

The acceleration of the system with only the two blocks is 1.25 m/s^2.

10 N = (3 kg + 5 kg) * a

a = 1.25 m/s^2

The acceleration of the system with the three blocks is now 0.625 m/s^2.

I'm trying to set up an equation to solve for the net force on the 3 kg block.

10 N + Force of block 3 on block 5 - Force of block 5 on block 3 = ...?

IF that's a correct equation.

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# Homework Help: Newton's Second Law Concerning Net Force

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