BIOMECHANICS: stability in sport (section 2)

Question 1

what is centre of mass

Answer 1

the point at which a body is balanced in all directions

Question 2

Centre of mass in a football

Answer 2

The COM is the direct centre that a symmetrical shape has with a football is located in the middle of the ball.

Question 3

centre of mass on a gymnast beam

Answer 3

as arms move upwards, our COM rises the weight also rises upwards.

Question 4

centre of mass of a diver leaving the board

Answer 4

allows rotation to occur much more easily as COM allows the diver to balance.

Question 5

Centre of mass for the fosbury flop techniques

Answer 5

spin is extended to move the COM outside the body, allowing the jumper to increase their height of their jump.

Question 6

what is stabillity?

Answer 6

the ability of a body to resist motion and remain at rest, or the ability to withstand a force to return to its original position.

Question 7

four factors that effect the stability of an athlete

Answer 7

-centre of mass
-mass
-line of gravity
-base of support

Question 8

how does COM effect the stability of an athlete?

Answer 8

lower the centre of mass the more stable we are meaning that the higher the COM the less stable we are.

Question 9

how does mass effect the stability of an athlete?

Answer 9

the greater the mass, the greater the stability.
less mass=unstable

Question 10

how does line of gravity effect the stability of an athlete?

Answer 10

within the bass=stable
outside the base= unstable

Question 11

how does base of support effect the stability of an athlete?

Answer 11

larger the base of support=more stable
if number of points of contact increases the surface are of the base will increase which means it will be more stable