- #1

a1234

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## Homework Statement

I have a question about the pulley problem in the attachment.

## Homework Equations

This question can be answered using equilibrium of forces, namely Fx = 0 and Fy = 0.

## The Attempt at a Solution

The answer key states that for the sum of the x-components, we should use the equation FsinΘ - FsinΘ = 0, and similarly for y, 2FcosΘ - 150(9.8) = 0.

In this solution, why is the portion of the cord on the right side of the image (which makes a 45 degree angle) ignored? Is it because this portion does not apply a force on the 15-kg mass?

In general, how do we approach such problems, which have multiple pulleys at different angles?