Biomechanics

Question 1

Biomechanics

Answer 1

The branch of sports science that examines the causes and consequences of human movement

Question 2

Newton’s first law

Answer 2

A body continues in a state of rest or uniform velocity unless acted upon by an external or unbalanced force.

Question 3

a body

Answer 3

an athlete/performer or an object

Question 4

velocity

Answer 4

the rate of change in displacement

Question 5

force

Answer 5

a push or pull that alters the state of motion of a body

Question 6

internal force

Answer 6

generated by the contraction of skeletal muscle

Question 7

external force

Answer 7

comes from outside the body and acts upon it

Question 8

net force

Answer 8

the sum of all forces acting on a body

Question 9

balanced force

Answer 9

two or more forces acting on an object in opposite directions that combine and form a net force of zero

Question 10

unbalanced forces

Answer 10

forces acting on an object that are unequal in size in opposite directions that form a net force that’s not zero

Question 11

newton’s second law

Answer 11

a body’s change in momentum is proportional to the force applied and acts in the same direction as force applied

Question 12

newton’s third law

Answer 12

For every action force there’s an equal and opposite reaction force

Question 13

momentum

Answer 13

the quantity of motion possessed by a moving body

Question 14

acceleration

Answer 14

the rate of change in velocity

Question 15

limb kinematics definiton

Answer 15

Study of movement in relation to time and space; series of markers placed on athlete and tracked using 3d motion analysis.

Question 16

Centre of mass

Answer 16

the point at which a body is
balanced in all directions; the point from which a
weight appears to act

Question 17

Stability

Answer 17

the ability of a body to resist motion and
remain at rest

Question 18

4 factors affecting stability

Answer 18

• Mass of the body
• Height of the centre of mass
• Base of support
• Line of gravity

Question 19

Mass of the body

Answer 19

the greater the mass of the body
the greater it’s inertia and therefore the greater the
stability

Question 20

Height of the centre of mass

Answer 20

The lower the centre of mass the greater the
stability.

Question 21

Base of Support

Answer 21

The greater the size of the base of support the
greater the stability. ( Feet wider apart) to increase
the surface area. Also increasing the number of
points of contact

Question 22

Line of gravity

Answer 22

• The line of gravity is an imaginary line which
  extends from the centre of the mass downwards to
  the floor.
• The more central the line of gravity to the base of
  support the greater the stability.