PAPER 1 - Biomechanics Flashcards
Define Newton’s First law of motion : INERTIA
a body continues in a STATE OF REST or UNIFORM VELOCITY unless acted upon by an EXTERNAL or UNBALANCED FORCE
Define Newton’s Second law of motion : ACCELERATION
a body’s RATE OF CHANGE in MOMENTUM is PROPORTIONAL to the SIZE of the FORCE applied and acts in the SAME DIRECTION as the force applied
Define Newton’s Third law of motion : REACTION
for every ACTION FORCE applied to a body there is an EQUAL and OPPOSITE reaction force
What is the equation for VELOCITY ?
velocity = displacement / time taken
What is the equation for MOMENTUM ?
momentum = mass x velocity
What is the equation for ACCELERATION ?
acceleration = (final velocity - initial velocity) / time taken
What is the equation for FORCE ?
force = mass x acceleration
Define FORCE
a PUSH or PULL that ALTERS that state of motion of a body
Define INTERTIA
the RESISTANCE of a body to CHANGE its state of motion, whether at rest or while moving
Define VELOCITY
the RATE OF CHANGE in DISPLACEMENT
Define MOMENTUM
the QUANTITY of MOTION possessed by a body
Define ACCELERATION
the RATE OF CHANGE in VELOCITY
Define WEIGHT
GRAVITATIONAL PULL that the earth exerts on the body - (N)
Define REACTION
EQUAL AND OPPOSITE FORCE in response to the action force placed upon it
Define FRICTION
the force that OPPOSES the motion of TWO SURFACES in contact
