12PEA Biomechanics

To create ideal force summation, we use 1) the sum of as many parts of the body as possible 2) in the correct order - biggest muscles to smallest muscles and 3) is what?

• Greatest range of motion

• Greatest force

• Greatest power

• Greatest engineered motion

Ideally, starting a movement with force summation, which big muscles would we engage for power?

• Lower body (quadriceps, hamstrings, gluteus maximus)

• Mid section (abdominals, abductors, latissimus dorsi)

• Upper body (deltoids, biceps, triceps, wrist flexors)

• All of them at the same time

Which is the correct definition for centre of gravity, one of the three main factors in stability and balance?

• A spot around which weight is evenly balanced throughout the body. It takes on different positions as body position changes

• The area beneath an object or person that makes contact with the supporting surface (ie ground)

• A straight line that extends vertically through the centre of gravity into the ground

In stability and balance, one means when a person is in motion and the other means when they are in a still position. Which refers to the person in motion?

• Stability

• Balance

If you are running to hit a forehand in tennis, and your line of gravity is outside your base of support, which one are you?

• Unbalanced

• Unstable

• Stable

• Balanced

When trying to throw/hit/kick a ball as far as you can, what is the ideal angle of release (presuming there is no air pressure/wind)?

• 35-45 degrees

• 15-25 degrees

• 25-35 degrees

• 45-55 degrees

There are three external factors that affect projectile motion. They are gravity, air pressure/wind and what?

Which of the following is NOT one of the three main parts of projectile motion?

• Angle of release

• Height of release

• Speed of release

• Power of release

If kicking/hitting/throwing a ball into the wind and against the air pressure, would you go lower or higher with your angle of release?

• Higher

• Lower

One of these sports generally does not use optimal angle of release, which is around 35-45 degrees. Which one is it?

• Tennis

• Javelin

• Basketball

• Cricket