Biomechanics chapter 10

Projectile

a body whose motion is subject only to the
forces of gravity and fluid resistance

Kinetic chain:

a system of linked rigid bodies subject
to force application

Simple kinetic chain:

one in
which each segment participates
in no more than two linkages

Complex kinetic chain

one in
which a segment is linked to
more than two other segments

Closed kinetic chain:

one in which
motion at one link is possible only with
cooperative movement at other links

Open kinetic chain:

one in
which motion can occur at one
link in the chain without
cooperative motion at other links`

Newton’s law of universal gravitation:

Every body in the universe attracts every other body with
a force directed along the line of centers for the two
objects that is directly proportional to the product of their
masses and inversely proportional to the square of the
separation between the two objects.

Parabola:

a curved symmetrical shape

Dynamic fluid force:

acts upon a system that is moving
through a fluid

A parallel component called

drag

A perpendicular component called

Lift

The parallel component of dynamic
fluid force acts in the direction
opposite that of the system’s motion
through the fluid and is called

drag force

The perpendicular component of dynamic fluid force can
act in any direction that is perpendicular to the system’s
motion through the fluid even though it is termed

lift force

Vertical component, also called

perpendicular

Horizontal component

parallel

trajectory

the flight path of the center of gravity of a
projectile

Projection angle

the angle at
which the object is projected

Projection angle

also called angle of attack

Projection velocity

initial velcity or velocity at release

Relative projection height:

the mathematical difference
between the height of projectile release (projection
height), and the height of projectile impact or landing
(impact height)

Laws of uniformly accelerated motion:

relate
acceleration, displacement, time, and velocity in the
condition of a constant gravitational acceleration

The total horizontal displacement of a projectile is called
the

range