Lab 3: Basic Biomechanics Flashcards
The branch of physics dealing with the study of forces and the motion produced by their actions.
Mechanics
involves taking the principles and methods of mechanics and applying them to the structure and function of the human body.
Biomechanics
Involves factors associated with moving systems and can be divided into kinetics and kinematics.
Dynamics
Deals with factors associated with nonmoving or nearly nonmoving systems.
Statics
The property of matter that causes it to resist any change of its motion in either speed or direction
Inertia
The tendency of force to produce rotation around an axis.
Torque
A force developed by two surfaces, which tends to prevent motion of one surface across another.
Friction
A vector that describes speed and is measured in units such as feet per second or miles per hour.
Velocity-
Two types of mechanical quantities are:
vector and scalar
Force is which type of quantity?
vector
Force has two components which are
Magnitude and direction
A scalar quantity has only
magnitude
Examples of things measured in scalar quantity:
- length
- area
- volume
- mass
Gravity is the mutual attraction between the _________ and an _________ and gravitational force is always directed __________to the center of the earth.
- earth
- object_
- verticaly downward
How is mechanical advantage determined?
mechanical advantage = force arm/resistance arm MA=FA/RA
Newton’s 1st Law is The Law of interia
Anything at rest tends to stay at rest anything in motion tends to stay in motion
Newton’s 2nd Law is The Law of Acceleration
The amount of acceleration depends on the strength of the force applied to the object.
Newton’s 3rd Law is The Law of Action- Reaction
Reaction- For every reaction there is an equal and opposite reaction.
Examples of Linear Force:
- two people pulling a boat with the same rope in the same direction
- two people pulling on the same rope in opposite directions
Example of Parallel Force:
A three point pressure of bracing- two points in one direction and the third is always between the first two points in the opposite direction.
Example of Concurrent Force:
two people pushing a desk in a diagonal pattern. The people are perpendicular to each other.
A person’s Center of Gravity and Base of support.
Stability
