NCSF Biomechanics Flashcards
The rate, or a measure of the rate, of motion
Velocity
How quickly a position changes.
Speed
The capacity to do work.
Energy
Time rate of doing work or (Force x Distance)/Time
Power
The energy possessed by a body because of its motion.
Kinetic Energy
A change in the velocity of an object.
Acceleration
Transfer of energy by a force acting to displace a body
Work
The turning effect created by a force about an axis
Torque
A unit of power in the International System of Units equal to one joule per second.
Watt
Energy stored by an object by virtue of its position
Potential energy
Change in position that occurs when all points on an object move the same distance, in the same direction, and at the same time.
Linear motion
Mass of an object times the linear velocity of the object
Linear momentum
A single sided or unbalanced load
Asymmetrical load
A stable state characterized by the cancellation of all forces by equal, opposing forces.
Balance
The distance between the fulcrum and the point of resistance
Resistance Arm
A group of body segments connected by joints so that the segments operate together to provide a wide range of motion for a limb
Kinetic Chain
The role of a muscle whose torque opposes action
Antangonist
Role of a muscle whose torque aids the action, often referred to as the prime mover
Agonist
Name two internal forces that act on a body
- Tensile
2. Compressive
Name two external forces that act on a body
- Contact
2. Frictional
General motion is a combination of which two classifications of motion.
Angular
Linear
If the starting position is known, a particular motion can be quantified by:
Speed
Velocity
In weightlifting, positive work is known as:
Concentric Contraction
In weightlifting, negative work is known as;
Eccentric Contraction
