Graphics Reference
In-Depth Information
due to a force acting on that object; that force is friction. A rolling ball moving
along a flat surface is seen to slow down regardless of how fast the ball was
moving initially. Without any intervening force, the ball would roll on forever.
The reason the ball slows down at all is that it encounters friction as it travels
through the air and as it interacts with the surface it is rolling along. The
smoother the surface, the less friction there will be and the further the ball will
travel. The force acting on the ball changes its velocity and the ball slows down.
The direction of the force applied to an object will also determine the
direction that the object will move it. Kicking a ball will apply a force along a
given path, resulting in the ball moving in the direction of that path. Without
any other force being applied to the ball, it will continue to move in the same
FIG 2.4 a: An object will move in the
direction of the force applied. b: The
object will change direction depending
on the additional forces applied to it. c: An
object will move in a way determined by
the forces acting on it, in this instance a
propelling force and the downward pull
of gravity. d: The angle a force is applied
to a sphere will create varying degrees of
spin, which will determine its trajectory.
e: The direction of spin will determine in
which direction a ball will move.
Search WWH ::




Custom Search