- #1

Vriska

- 138

- 2

## Homework Statement

Need to find the acceleration of the blocks, all surfaces are smooth : https://drive.google.com/file/d/0B5bF4yPQOejoazhWeEgySmtfSnc/view?usp=drivesdk

## Homework Statement

Need to find the acceleration of the blocks

## Homework Equations

a1 + a2 + a3 =0 (acceleration of strings lengths must sum to zero)

F = ma

## The Attempt at a Solution

Acceleration of topmost string = a_a(acceleration of block a)

- a_b (is this right? I feel like this should be right but idk why)Acceleration of middle string also must be the same

And acceleration of bottom string is simply T (where T is tension in the string, assuming mass is 1)

3T = 4a_b (for block b), F - 2T = 2a_a, T = a_c.

Solving all this gives me the wrong answer : /I'm suspecting somethings wrong with the first step, is it?

## Homework Equations

a1 + a2 + a3 =0 (acceleration of strings lengths must sum to zero)

F = ma

## The Attempt at a Solution

Acceleration of topmost string = a_a(acceleration of block a)

- a_b (is this right? I feel like this should be right but idk why)Acceleration of middle string also must be the same

And acceleration of bottom string is simply T (where T is tension in the string, assuming mass is 1)

3T = 4a_b (for block b), F - 2T = 2a_a, T = a_c.

Solving all this gives me the wrong answer : /I'm suspecting somethings wrong with the first step, is it?