- #1

Asphyxiated

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## Homework Statement

A picture of the problem and the original question can be seen http://images3a.snapfish.com/232323232%7Ffp733%3B9%3Enu%3D52%3A%3A%3E379%3E256%3EWSNRCG%3D335%3A73%3C377347nu0mrj".

## Homework Equations

## The Attempt at a Solution

Note that I made my coordinates so that Fn and T on m1 are the y and x axis respectively, also g will be rounded to 10 m/s^2 even though 9.8 is closer to the real value.

So first I know:

[tex] T=m_{2}g [/tex]

[tex] F_{n}=m_{1}gcos(30) [/tex]

So the only movement should be in the x direction so Fnet in y should be zero but here are my components:

[tex] F_{net_{x}}=-m_{1}gsin(30)+T=ma [/tex]

[tex]F_{net_{x}}=-m_{1}gsin(30)+m_{2}g=ma [/tex]

[tex] f_{net_{y}}=F_{n}-m_{1}gcos(30)=0 [/tex]

and i think I should solve Fnetx for a with m = 5, correct?

[tex] F_{net_{x}}=-(5)(10)(\frac{1}{2})+(7)(10)=(5)a [/tex]

[tex] F_{net_{x}}=-25+70 = 5a [/tex]

[tex] F_{net_{x}}= \frac {45}{5} = a [/tex]

[tex] a = 9 [/tex]

which is not the correct answer, where did I go wrong?

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