BIOMECHANICS 1 Flashcards

1
Q

LINEAR MOTION

A

when a body moves in a straight or curved line, with all parts moving the same distance in the same direction at the same speed

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2
Q

FORCE

A

a push or pull that alters, or tends to alter, the state of motion of a body (N)

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3
Q

INTERIA

A

the resistance of a body to change its state of rest or motion

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4
Q

VEOCTIY

A

the rate of motion in a particular direction. velocity = displacement / time (ms-1)

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5
Q

MOMENTUM

A

the quantity of motion possessed by a moving body. momentum = mass x velocity (kg ms-1)

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6
Q

ACCELERATION

A

the rate of change of velocity. acceleration = change in velocity / time (ms-2)

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7
Q

ACTION FORCE

A

force exerted by a performer on another body

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8
Q

REACTION FORCE

A

an equal and opposite force to the action force exerted by a second body on the first.

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9
Q

MASS

A

the amount of matter or substance in a body

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10
Q

DISTANCE

A

the path taken in moving from the first position to the second (m)

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11
Q

DISPLACEMENT

A

the shortest straight-line route between two positions in a stated direction (m)

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12
Q

SPEED

A

a body’s movement per unit time (m/s)

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13
Q

DECELERATION

A

the rate of decrease I’m velocity. deceleration = change in negative acceleration / time (ms-2)

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14
Q

LAW OF CONSERVATION OF MOMENTUM

A

in any system if bodies that exert forces on each other, the total momentum in any direction remains constant unless some external force acts on the system in that direction

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15
Q

INTERNAL FORCE

A

force generated by the contraction of skeletal muscle

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16
Q

EXTERNAL FORCE

A

force that comes from outside the body

17
Q

NET FORCE

A

the overall force acting on a body when all the individual forces have been considered (resultant force)

18
Q

STATICS

A

the study of bodies that are in a constant state of motion

19
Q

DYNAMICS

A

the study of bodies that are changing their state of motion

20
Q

BALANCED FORCES

A

when two or more forces acting on a body are equal in size but opposite in direction, resultant net force is zero

21
Q

UNBALANCED FORCES

A

when force acting in one direction is greater in size than the force acting in the opposite direction, resultant ret force is either positive or negative

22
Q

WEIGHT

A

force on a body exerted by the earths attraction (N)

23
Q

GRAVITIATIONAL FORCE

A

the force that attracts a body to the centre of the earth