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## Homework Statement

mass 1 is 2.0 kg, the static and kinetic coefficients of friction are .30 and .20 respectively.a) What is mass 2 if it travels uniformly upward?

b) Downward?

c) mass 1 and 2 are at rest?

## Homework Equations

## The Attempt at a Solution

Part c is the easiest. Friction and Tension are going to be the same so [tex]m_{2} = \mu_{s}m_{1}[/tex].

Part a, I did the same thing about except I used [tex]\mu_{k}m_{1}[/tex].

Part b, [tex]m_{1}g = \mu_{k}m_{1}g[/tex]

[tex]m_{2} = m_{1}/\mu_{k}[/tex]

Is this right?

Why is it that I can ace Abstract Algebra but this gives me a headache?