Final answer:
Static balance refers to an object at rest with no motion, while dynamic balance involves constant velocity motion without acceleration, where forces remain balanced.
Step-by-step explanation:
Differences between Static Balance and Dynamic Balance
Static balance refers to a body at rest and implies no movement whatsoever, either translational or rotational, within a selected inertial frame of reference. It is when all forces are balanced, and there is no net force or net torque acting on the object. Merely put, an object in static balance stays put without tilting, spinning, or moving.
Dynamic balance, on the other hand, occurs when an object is moving with constant linear and angular velocities, meaning it's in motion but not accelerating. Dynamic equilibrium involves a situation where forces are balanced, much like in static balance, but the object in question is in motion rather than at rest. It is crucial to note that whether a body is considered in static or dynamic balance can depend on the observer's frame of reference, since motion is relative.
In practical applications, static balance is significant in construction and engineering, where structures like bridges or buildings must maintain equilibrium without any motion. While dynamic balance is observed in objects like cars or bicycles, where they are moving at a constant velocity and are not accelerating, yet their forces are balanced. Ancient people's understanding of statics and dynamics led to the creation of simple machines that were key to early engineering innovations.