BIOMECHANICS: principles of motion (section 2) Flashcards
what is biomechanics?
the branch of sport science that uses mathematics and newtons law of motion to explain movement. An understanding of bio mechanics can help a coach improve an individual performance.
Why use bio mechanics?
- to improve performance
-to prevent injury
Definition of linear motion
movement of a body or object in a straight or curved line when an external force is applied
definition of force
a push or pull
equation for force and measurement
mass* acceleration
measured:newtons
definition of mass
the quantity of matter a body possesses
definition of weight
gravitational force exerted on an object
equation for weight and measurement
mass* gravitational pull
measurement: newtons
definition of inertia
the reluctance of a body to move or change its state of motion
definition of momentum
the amount of motion a moving object or individual possess
equation for momentum and measurement
mass* velocity
measurement: kgm/s
definition of distance
the path a body takes as it moves from the starting position
distance measurement
meters
definition of displacement
the shortest route in a straight line between the start and finish
definition of speed
measurement of a body movement per unit of time with no reference to direction
equation for speed and measurement
distance/time
measurement: m/s
definition of velocity
the rate of change of displacement
equation for velocity and measurement
displacement/time
measurement: m/s
definition of acceleration
the rate of change of velocity
equation for acceleartion and measurement
change in velocity/time
measurement: m/s squared
what is a scalar quantity?
a measurement that has magnitude only such as mass, speed and distance
what is a vector quantity?
a measurement that has both direction and magnitude such as acceleration, velocity and momentum.
