# How to do 187th question?

##### 2 Answers

#### Answer:

See below.

#### Explanation:

Considering the rope length

We have

now deriving twice

but

Solving those equations we obtain

we leave the conclusions to the reader.

#### Answer:

The question asks for each one is Incorrect...

(4)

#### Explanation:

As general statement:

Since

Here's the formula for tension of two masses:

Substitute for

Number 2 is correct

Substitute for

Number 1 is also correct

Number 3 however refers to the MAGNITUDE of relative acceleration in comparison to the pulley, so we can add to our statement:

Substitute for

Number 3 is also correct

Number 4 is incorrect because:

going back to:

Solve for

So: