Biomechanics of Exercise Flashcards
(35 cards)
Define biomechanics.
The physical study of movement
What is stability?
The ability to maintain a balanced state
What is force?
The interaction that creates work, action, or physical change
What is magnitude?
How much force is applied to the dumbbells, barbells, or machine handles
What is direction?
The way in which the force is applied
What is the point of application?
Where the force is applied on the body or implement being used
What is the line of action (Line of force)?
An imaginary straight line drawn from the point of application of force through the direction of force
What is the angle of pull?
Angle at which a muscle pulls relative to the long axis of the bone on which it pulls
What is work?
Force x distance. Measured in foot-pounds and similar units
Example: lifting a 200-pound barbell 8 feet requires 1,600 foot-pounds of work
Define power.
The work done in a unit of time
What is Newton’s First Law?
An object at rest tends to stay at rest and an object in motion tends to stay in motion; unless acted upon by an outside force
What is inertia?
Tendency for an object to remain in its current state( in motion or at rest)
What are the two types of inertia?
- Resting inertia
2. Moving inertia
What is resting inertia?
An object at rest will stay at rest unless acted upon by an outside force
What is moving inertia?
An object in motion will stay in motion unless acted upon by an outside force
What is range of motion(ROM)?
The movement of a joint from full flexion to full extension
What is Newton’s Second Law?
In order to create a force, you must place a mass into motion with acceleration and a change in velocity
What is mass?
A body of coherent matter
What is acceleration?
The rate of change of velocity per unit of time
What is velocity?
The speed of something in a given direction
What is momentum?
The quantity of motion of a moving body, measured as a product of its mass and velocity.
What is the formula for finding Force?
Force = Mass x Acceleration
Gravity exhibits an acceleration of approximately ____ grey per second squared.
32.2
What is Newton’s Third Law?
Objects in contact exert equal and opposite forces on each other
