Applying forces in sport

Question 1

what are the three pairs of forces in sport

Answer 1

vertical forces
horizontal forces
paired forces

Question 2

what are the vertical forces

Answer 2

weight - down
ground reaction force (GRF) - up

Question 3

what are the horizontal forces

Answer 3

friction - forwards
air resistance - back

Question 4

what are the paired forces - Newtons 3rd law

Answer 4

action force
reaction force

Question 5

how do you move on a diagonal in sport

Answer 5

horizontal and vertical forces

Question 6

what are balanced forces

Answer 6

when two or more forces are in operation that are equal in size but opposite in direction, the net force = 0

Question 7

what are unbalanced forces

Answer 7

when a force acting in one direction is greater than one acting in the opposite direction

this will cause acceleration or deceleration in one direction (2nd law) once overcoming inertia (1st law)

Question 8

what are the resultant forces

Answer 8

the outcome of the two forces meeting

zero = balanced
positive = acceleration
negative = deceleration

Question 9

what does friction appose

Answer 9

movement

movement is different from direction of motion - a foot pushes backwards to move a body forwards

Question 10

what surfaces generate alot of friction

Answer 10

astro-turf
spikes
studs
tires

Question 11

tips to follow for a free body diagram

Answer 11

length of the arrow reflects the size of the force
draw a direction of motion arrow
add vertical and horizontal forces
mention resultant forces
W and AR are drawn form center of mass (belly button)
GRF and F arrow starts from where the two bodies meet (usually ground and foot or hands and equipment)