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pe > BIOMECHANICS: principles of motion (section 2) > Flashcards

BIOMECHANICS: principles of motion (section 2) Flashcards

1
Q

what is biomechanics?

A

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.

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2
Q

Why use bio mechanics?

A
  • to improve performance
    -to prevent injury
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3
Q

Definition of linear motion

A

movement of a body or object in a straight or curved line when an external force is applied

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4
Q

definition of force

A

a push or pull

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5
Q

equation for force and measurement

A

mass* acceleration
measured:newtons

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6
Q

definition of mass

A

the quantity of matter a body possesses

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7
Q

definition of weight

A

gravitational force exerted on an object

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8
Q

equation for weight and measurement

A

mass* gravitational pull
measurement: newtons

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9
Q

definition of inertia

A

the reluctance of a body to move or change its state of motion

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10
Q

definition of momentum

A

the amount of motion a moving object or individual possess

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11
Q

equation for momentum and measurement

A

mass* velocity
measurement: kgm/s

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12
Q

definition of distance

A

the path a body takes as it moves from the starting position

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13
Q

distance measurement

A

meters

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14
Q

definition of displacement

A

the shortest route in a straight line between the start and finish

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15
Q

definition of speed

A

measurement of a body movement per unit of time with no reference to direction

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16
Q

equation for speed and measurement

A

distance/time
measurement: m/s

17
Q

definition of velocity

A

the rate of change of displacement

18
Q

equation for velocity and measurement

A

displacement/time
measurement: m/s

19
Q

definition of acceleration

A

the rate of change of velocity

20
Q

equation for acceleartion and measurement

A

change in velocity/time
measurement: m/s squared

21
Q

what is a scalar quantity?

A

a measurement that has magnitude only such as mass, speed and distance

22
Q

what is a vector quantity?

A

a measurement that has both direction and magnitude such as acceleration, velocity and momentum.

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