I am interested in how people use physical reasoning for a variety of common-sense tasks such as prediction, inferences about object properties, or action planning. To support these capacities, we all have the ability to simulate how our environment will unfold based on the physics of the world. By using a combination of psychophysics and computational modeling, I study how we are able to perform this simulation, how we select between simulations and other forms of physical knowledge, and how we can draw on these predictions to make inferences about the world and plan our actions.