3.1 biomechanical principles newtons laws

Question 1

biomechanical principles

Answer 1

the study of human movement and the effects of force and motion on performance

Question 2

what do biomechanics allow coaches to do

Answer 2

• analyse performance
• maximise movement efficiency
• and sporting technique
  -reduce prevent injury
  -design and choose correct equipment

Question 3

newtons first law of motion

Answer 3

object at rest will remain at rest unless acted on by another force

Question 4

newtons second law of motion

Answer 4

f = m x a

Question 5

inertia

Answer 5

the mass that gravity pulls down to the ground great mass the greater inertia

Question 5

momentum

Answer 5

the quantity of motion possessed by a moving body (kgm/s) = mass x velocity

Question 6

newtons third law of motion

Answer 6

for every force there is an equal and opposite force

Question 7

velocity

Answer 7

velocity = displacement / time taken

Question 8

acceleration

Answer 8

final velocity - initial velocity / time taken - m/s

Question 9

force:

Answer 9

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

Question 10

net force

Answer 10

the sum of all forces acting on a body and the resultant force

Question 11

vertical forces

Answer 11

weight - mass x gravity
reaction - equal and opposite force exerted by the body in newtons

Question 12

balanced forces

Answer 12

two or more forces acting on a body are equal in size

Question 13

unbalanced forces

Answer 13

when two forces are unequal

Question 14

horizontal forces

Answer 14

friction - force that opposes the motion of two surfaces
air resistance - force that opposes the motion of a body through air