chapter 8 biomechanics Flashcards
what does biomechanics mean?
using principles and methods of mechanics and applying them to the human body
what does mechanics mean?
study of forces and the motion produced as a result of those forces
what does statics mean?
nonmoving
what does dynamics mean ?
moving
the meaning of scalar?
describes magnitude only i.e. volume, length, area, mass
the meaning of vector
a quantity having both magnitude and direction
the meaning of torque?
tendency of a force to cause rotation around an axis
Object at rest tends to stay at rest, and an object in motion tends to stay in motion. which law is?
newtons first law
The amount of acceleration depends on the strength of the force applied to an object
Can also mean a change in direction – need force to change direction
Acceleration is inversely proportional to the mass of an object.
which law is this one?
newtons second law of acceleration
For every action there is an equal and opposite reaction
The reaction is always = in strength to the action and the reaction occurs in the opposite direction.
newton third law action - reaction
what is linear force?
2 or more forces acting along same line
what is parallel force ?
forces occur in the same plane in the same or opposite direction
what are concurrent forces?
2 or more forces act from a common point but pull in different (divergent) directions which results in a “resultant force
resultant force meaning?
net effect of two divergent forces
Lies somewhere in between
define force couple?
Occurs when two forces act in an equal but opposite direction
Results in a turning effect