In
physics, a
force is any interaction that, when unopposed, will change the
motion of an object. In other words, a force can cause an object with
mass to change its
velocity (which includes to begin moving from a
state of rest), i.e., to
accelerate. Force can also be described by intuitive concepts such as a push or a pull. A force has both magnitude and
direction, making it a
vector quantity. It is measured in the
SI unit of
newtons and represented by the symbol
F.