Lecture Note Questions

Question 1

‘Understanding of velocity and acceleration’ is a…?

Answer 1

Biomechanical principle

Question 2

The action-reaction law is a…

Answer 2

Biomechanical principle

Question 3

The effects of arm and leg length and muscle power on torque production is an example of…

Answer 3

A biomechanical principle

Question 4

The effects of centre of gravity location is an example of…

Answer 4

A biomechanical principle

Question 5

The conservation of angular momentum is an example of…

Answer 5

A biomechanical principle

Question 6

What is an open kinetic chain?

Answer 6

One end of the chain is fixed, the other is free to move.

The end of the chain can move independently of the other end.

Question 7

Does the movement of proximal segments in an open kinetic chain always result in complete movement?

Answer 7

No

Question 8

True or false: in an open kinetic chain, the end of the chain can move independently of the other end.

Answer 8

True

Question 9

True or false: in an open kinetic chain, the end of the chain can NOT move independently of the other end.

Answer 9

False

Question 10

Describe a push-like movement pattern.

Answer 10

All segments are moving simultaneously.

Question 11

Describe a throw-like movement pattern.

Answer 11

Proximal segments move prior to distal segments

Question 12

In an open kinetic chain, push-like patterns allow…

Answer 12

…high force or high accuracy

Question 13

In an open kinetic chain, throw-like patterns allow…

Answer 13

…high movement velocities with less accuracy

Question 14

What is the limitation of an open-chain push-like pattern?

Answer 14

Speed is limited to speed of muscle shortening.

Question 15

How does an open chain throw-like pattern allow high movement speeds?

Answer 15

Transfer of angular momentum

Storage & release of elastic energy.

Question 16

What is the radius of gyration, and what is it important in?

Answer 16

The distribution of mass with respect to a given axis of rotation.
Changes as point of rotation changes.
Important in calculating inertia: I = mk^2

Question 17

What is the radius of gyration, and what is it important in?

Answer 17

The distribution of mass with respect to a given axis of rotation.
Changes as point of rotation changes.
Important in calculating inertia: I = mk^2

Question 18

How does the conservation of angular momentum apply to open kinetic chain throw-like patterns?

Answer 18

By suddenly stopping the proximal segment, the momentum is transferred to more distal segments.

Question 19

How do skilled performers complete a movement?

Answer 19

Large number of segments
Allowing segments to lag & whip
Free movement of joints
Proximal to distal sequencing
Large range of motion

Question 20

How do unskilled performers complete a movement?

Answer 20

Small number of segments
Distal segments don't lag
Stiff joint movement
Lack of sequencing
Small range of motion

Question 21

What is joint power?

Answer 21

The rate at which energy is created or absorbed around a joint.

Question 22

What is running economy?

Answer 22

The energy demand for a given velocity of submaximal running.

Question 23

What is Rate of Force Development?

Answer 23

The change in force over a given time.