a branch of classical mechanics that
describes the motion of points,
bodies , and systems of bodies without
considering the mass of each or the forces that caused the motion. Kinematics,
as a field of study, is often referred to as the “geometry of motion”
and is occasionally seen as a branch of mathematics. A kinematics problem
begins by describing the geometry of the system and declaring the initial
conditions of any known values of position, velocity and/or acceleration of
points within the system. Then, using arguments from geometry, the position,
velocity and acceleration of any unknown parts of the system can be determined.
The study of how forces act on masses falls within kinetics. For further details,
see analytical dynamics.
Kinematics is used in astrophysics to describe the motion of celestial bodies and collections of such bodies. In mechanical engineering, robotics, and biomechanicskinematics is used to describe the motion of systems
composed of joined parts such as an engine, a robotic arm or the human skeleton.
transformations, also called rigid transformations, are
used to describe the movement of components in a mechanical system, simplifying the derivation of the equations
of motion. They are also central to dynamic analysis.
Kinematic analysis is
the process of measuring the kinematic quantities used to describe motion. In
engineering, for instance, kinematic analysis may be used to find the range of
movement for a given mechanism, and working in
reverse, using kinematic synthesis to
design a mechanism for a desired range of motion. In addition, kinematics
applies algebraic geometry to
the study of the mechanical advantage of
a mechanical system or
most important application in daily life
Pole vault is an event in track and field and it
requires a lot of strength and the correct technique. This event in particular
has a lot to do with physics; starting from the run on the runway, to the take
off, to the inversion and finally landing on the safe foam pit.
in the picture, I am running towards the pit and focusing on taking off to get
height. Before I start running, my beginning position is at 22.5 meters and my
velocity is 0 m/s. I need to pick up enough speed to get me off the ground and
over the bar. My velocity increases and my acceleration is constant as I
approach the end of the runway. When I reach about 2.7 meters (9 feet) from the
edge of the box in the ground and the pit, I will jump vertically. My velocity
at 2.7 meters will be my maximum speed and acceleration still constant.
I reach the end of my run and carefully counted steps, I will takeoff. All of
my energy from my increased velocity will be transferred into my pole and it
will bend. While the pole bends, it also pulls me into the pit. The bend and
movement of the pole all depends on how great my velocity was by the end of my
run. If I slow down, meaning my velocity decreases as well as my acceleration,
the pole won’t bend enough and I won’t get enough height to clear the bar.
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