Transcript Force Summation Baseball Pitch – Preparation

Year 11 PE

To give an object momentum in activities
such as throwing, kicking or striking an
object, the amount of momentum given to
the object is determined by ‘the sum of
all forces generated by each body
part.

To get as much force as possible
◦ 1.) Use as many muscles as possible. E.g use the
quads, abdominals, deltoid, forearm etc.
◦ 2.) Use the muscle in the correct order, using large
muscle first and then the smallest muscles last.
◦ 3.) Use the proper sequence. This is important so
that force is transferred from muscle to muscle.
◦ 4.) Stretch muscles to their full length.
Look at his Base of Support!!
The first muscles
Being activated are
In the legs.
Eg. Gastrocnemius,
Quadriceps, and
Hamstrings.
First movement, is
to step forward
Momentum transfers
from the legs to
hips and lower back
as the hips rotate
around.
Momentum transfers
from the torso, to the
shoulder. Look at the
position of the elbow.
try to put your elbow
in that position without
the help of force
Summation.
Momentum transfers
from the shoulder to
the elbow, which is
now fully extended.
Lastly the
momentum
transfers to the
wrist, which
flexes downwards
as the ball is
released
A proper follow
through, indicates
that there was an
efficient transfer of
momentum. In
addition, the follow
through also safely
slows
down the muscles

Watch for the transfer of momentum from
one muscle group to the next.