Biomechanics

What happens when the timing and sequence of a movement is wrong?

• It will look uncoordinated and not produce maximum force

• It will look coordinated and provide maximum force

The greater the range of movement

• the more efficient your arms rotate

• the limbs should be straight and strong at the time of release

• the better the extension & flexion of arms

• the higher the speed of the extremities on release/contact

Which angle will produce the greatest range (in the absence of air resistance)?

• 0 degrees
• 45 degrees
• 90 degrees
• none of these

What force acts in the y direction that causes an object to travel in a parabolic arc?

• Friction
• Gravity
• Tension
• No force acting.

Low center of gravity leads to more stability

• true
• false
• sometimes true -sometimes false
• does anyone REALLY know the answer to this kind of question?

A man wants to shoot an arrow so that it has the greatest range (horizontal distance). At what angle should he shoot the arrow?

• 10 degrees

• 45 degrees

• 60 degrees

• 90 degrees

At which of the following places does a projectile have the greatest velocity?

• At the peak of its trajectory

• Half way up to the peak

• At the instant it is launched

• It has the same velocity at all places

The Height of Release of a projectile is:

• Is always the same

• The difference between the height of the release point and the landing point.

• Important in determining the speed at which a projectile will travel

• Has no effect to a projectile

Sequential Movement

• Body parts involved move in sequence from largest, fastest and weakest segments

• Body parts involved move in sequence from smallest, slowest and strongest segments

• Body parts involved move in sequence beginning with the largest slowest and strongest segments.

• Body parts involved move at the same time and in the same direction

You can improve stability by:

• Increasing Base of Support

• Increasing the mass of a body

• Lowering the Centre of Gravity

• Leaning forward