# Two masses connected by strings on an incline

This is a problem from my physics homework. I copied the diagram below as best I could from the text. It's not the best rendering but you'll get the idea.

1. Homework Statement

Two blocks are at rest on a frictionless incline, as shown in the figure. Part A. What is the tension in the string number 1 if m1 = 9.0kg and m2 = 3.9kg?
Part B. What is the tension in the string number 2 if m1 = 9.0kg and m2 = 3.9kg?

The answer to Part A is: T1 = 30.2 N, which I don't understand.

## Homework Equations

So far, I know the following:
F = ma
Fx = max
Fy = may
w = wy = mg = 9.0kg * 9.8 m/s2 = 88.2 N

## The Attempt at a Solution

I tried splitting the tension of string 1 into its vector x and y components, but that wasn't getting me to the right answer. I am not quite sure where to start or how they got that answer, 30.2 N (part A). Any guidance would be much appreciated.

Ty = mg = 88.2 N
T = Ty/sin(20) = 257.9 N Hi David welcome to PF.
I suggest you to choose your co-ordinate axis as shown in figure.
After drawing free body diagrams of m1 can you find T1?

Simon Bridge