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Issa unit 5
Terms in this set (34)
The study of movement.
The ability to maintain a balance state.
The interaction that creates work,action,or physical change.
How much force is applied to the dumbbells,barbells,or machine handles.
The way in which the force is applied.
Point of application
Where the force is applied on the body or implement being used.
Line of action (line of force)
An imaginary straight line drawn from the point of application of force through the direction of force.
Angle of pull
The angle at which a muscle pulls relative to the long axis of the bone on which pulls.
Force times distance measured in foot pounds and similar units. Example: lifting a 200 pound barbell 8 feet and lifting a 400 pound barbell 4 feet each require 1600 foot pounds of work.
The work done in a unit of time.
The tendency for an object to remain in its current state (in motion or at rest).
An object is at rest,it will stay at rest unless acted upon by some outside force.
An object that is in motion will stay in motion unless acted upon by some outside forces.
Range of motion (ROM)
The movement of a joint from full flexion to full extension.
A body of coherent matter.
The rate of change of velocity per unit of time.
The speed of something in a given direction.
The quantity of motion of a moving body, measure as a product of its mass and velocity.
Rigid bar that turns about an axis of rotation or a fulcrum.
The point on which a lever rests or is supported and on which it pivots.
First class lever
Fulcrum in the middle,the effort is applied on one side of the fulcrum and the resistance on the other.
Second class lever
A lever in which the load lies between the fulcrum and the effort.
Third class lever
A lever in which the effort is places between the fulcrum and the load
The magnitude of twist around an axis of rotation (fulcrum)
The downward pulling force that creates resistance.
Center of gravity
The point in the body around which your weight is equally distributed.
Line of gravity
A vertical line straight down from the center of gravity.
The ability to perceive your position and movement of the body or body limbs in space.
Visual reference point
A chosen point of focus to aid in stability and balance.
What are the principles of stability?
The larger the base of support,the greater the body stability.
What is the proper foot placement and weight distribution for back squat and bench press?
Back squat: feet are parallel and shoulder with apart. The weight should be close to you overhead.
Bench press:feet should be always on the floor helps control weight.
Explain newton's first law of motion?
Newton's first law of motion is an object at rest tends to stay at rest,and an object in motion tend to stay in motion.
Explain newton's second law of motion in relation to mass and acceleration?
Newton's second law of MA is in order to create force,you must place mass in to motion with acceleration and change velocity.
Explain Newton's third law of motion.
Newton's third law of motion is that objects in contact exert equal and opposites forces on each other.