View Dynamics
Dynamics refers to the causes and changes of motion as it pertains to physics. Dynamics as a feature set is a simulation system that mimic real world results when using gravity, mass, friction, forces, and so on. By assigning object and environmental attributes such as mass, friction and so on, and setting gravity to earth-normal, the resulting simulation will behave in a manner similar to what we experience in our real lives. It is often much easier (and visually preferable) to use the dynamics system instead of hand keyframing the result, though this is not always the case. At times, keyframing can match the overall mood or feel (such as a cartoon.)