1/17
Looks like no tags are added yet.
Name | Mastery | Learn | Test | Matching | Spaced |
---|
No study sessions yet.
Mechanics
The science concerned with the effects of forces acting on objects
Rigid body mechanics
Studies how solid objects (bones) move when forces act on them, assuming the object doesn’t change shape or size
Deformable body mechanics
Studies how solid bodies change shape under applied external forces
2 subclasses of biomechanics
Static- no motion (sum of forces=0)
Dynamic- motion (sum of forces does not equal 0)
Kinematics
Objects (m) are moving (a)
Kinematics
Study of forces (F) that cause motion
Length
Gives magnitude; general distance measurement
Mass
The amount of matter in an object and is a measure of its inertia
Weight
The force of gravity acting on an object’s mass (F=m*g)
Mass vs Weight
Mass is the amount of matter in an object (remains constant) whereas weight is the force of gravity acting on that mass and changes with location
Inertia
Objects in motion stay in motion, objects at rest stay at rest unless acted on by another force
Force
A physical push or pull on an object that can change its motion, speed, direction
Newton of Force (N)
The force required to accelerate a one-kg mass at a rate of one meter per second squared
Vector
Has magnitude and direction
Scalars
Has magnitude
Internal Forces
Forces that act within a system to resist external forces and cause movement
Tensile: apart
Compressive: together
External Forces
Forces from the environment that act on the human body, influencing motion and posture
Gravitational force
Fundamental, attracts non contact force between any two objects that have mass or energy