### Newton's laws 8.2: Additional Question 3

#### Description

A 10-kg mass is attached via a pulley to another variable mass *m* (position is in meters
and time is in seconds). You can test the limits of the formula for the acceleration of an Atwood's
machine by changing the ratio of the masses above.

#### Question

Which of the following are true?

**when M=m => a=g**
**when M=m => a=0 **
**when M>>m => a=g **
**when M>>m => a=0**
**when M<m => a=0**
**when M<m => a=g **
**when M<m => a<0**

#### Answer

2, 3, and 7.

#### Reference

See Giancoli-PA: 4-7, Giancoli-SE: 4-7.

#### Credits

Physlet problem authored by Mario Belloni.

**© 2000 by Prentice-Hall, Inc. A Pearson Company**