The pulley in the device below has no mass and is frictionless. The larger mass is 30 kg and the smaller mass is 20 kg. What is the acceleration of the masses?

The Praxis General Science: Content Knowledge (5435) exam is a test required by many states for credential candidates planning to teach science at a high school level. It is a single, computer-delivered test that includes questions from five content domains.

The content categories are Scientific Methodology, Techniques, and History; Physical Science; Life Science; Earth and Space Science; and Science, Technology, and Society.