# Atwood machine (Forces and Motion) (Greater than; Less than; Equal to; True or False)

1. Feb 21, 2010

### huybinhs

1. The problem statement, all variables and given/known data

A frictionless, massless pulley is attached to the ceiling, in a gravity field g = 9.81 m/s2. Mass Mb is greater than mass Ma. The tensions Tx,Ty, Tz, and the constant g are magnitudes. (Select a response for each statement.)

Please look at this pic:
http://i995.photobucket.com/albums/af79/huybinhs/atwoodmachine.png

Choices:
Greater than; Less than; Equal to; True or False.

The center-of-mass of Mb and Ma accelerates.
Ty is .... (Mb)g.
Tz is .... (Ma)g + (Mb)g.
Tx+Ty is .... Tz.
The magnitude of the acceleration of Mb is .... that of Ma.
Tx is .... Ty.

2. Relevant equations

F = ma

3. The attempt at a solution

1 Incorrect. (Try 1)
True
Less than
Equal to
Equal to
Equal to
Equal to

2 Incorrect. (Try 2)
True
Less than
Greater than
Equal to
Equal to
Equal to

3 Incorrect. (Try 3)
True
Less than
Greater than
Less than
Equal to
Equal to

4 Incorrect. (Try 4)
False
Less than
Greater than
Less than
Equal to
Equal to

5 Incorrect. (Try 5)
False
Less than
Equal to
Equal to
Equal to
Equal to

6 Incorrect. (Try 6)
False
Less than
Equal to
Greater than
Equal to
Equal to

2. Feb 21, 2010

### kuruman

Re: Atwood machine (Forces and Motion) (Greater than; Less than; Equal to; True or Fa

What is your thinking about answering these questions? Why did you give these particular answers to these tries? How do you think the "Relevant Equation" F = ma applies to all this?

3. Feb 22, 2010

### mparsons06

Re: Atwood machine (Forces and Motion) (Greater than; Less than; Equal to; True or Fa

Hey Binh,

Did you figure this one out yet? I have racked my brain and researched, but no luck and I've already used 8 tries...