05b. Biomechanics - Momentum

Question 1

Describe Impulse

Answer 1

The change in momentum (fxt)

Question 2

Describe Momentum

Answer 2

The motion a body possesses (m x v )

Question 3

Describe Conservation of momentum

Answer 3

Whenever two bodies collide, the combined momentum of the two is conserved (stays the same).

Question 4

List the two type of foce summation

Answer 4

Simultaneous and sequential force summation.

Question 5

List the 4 ways to produce the greatest force during sequential force summation

Answer 5

Strongest and largest body parts first, use as many body parts as possible, transferring momentum from one body part to another when at maximum velocity, ensuring an appropriate follow through to avoid unnecessary deceleration.

Question 6

Describe Angular Momentum

Answer 6

Product of moment of inertia and angular velocity

Question 7

Describe Moment of Inertia

Answer 7

The measure of an objects resistance to change its rate of rotation, based on the distance of mass distributed from axis

Question 8

List the two components of moment of inertia

Answer 8

The mass of the rotating body and the distance the mass is dsitributed from its access of rotation

Question 9

To increase impluse you can

Answer 9

increase time over which force is applied

Question 10

Based on impulse, to decease risk of injury/impact you can

Answer 10

increase time over which force is absorbed/distributed

Question 11

To increase momentum during an activity you can

Answer 11

increase velocity/speed

Question 12

What is the biomechanical principle that states that when two bodies collide the combined momentum will be the same before and after collision

Answer 12

Conservation of momentum

Question 13

What happens to angular momentum throughout a movement

Answer 13

It remains constant/stays the same

Question 14

If mass is distributed closer to the axis, what happens to moment of inertia

Answer 14

it decreases

Question 15

If mass is distributed further away from the axis, what happens to moment of inertia

Answer 15

it increases

Question 16

Should mass be distributed closer to or further away from the axis to decrease moment of inertia

Answer 16

closer to

Question 17

Should mass be distributed closer to or further away from the axis to increase moment of inertia

Answer 17

further away

Question 18

If moment of inertia increases, what happens to angular velocty

Answer 18

decreases

Question 19

If moment of inertia decreases, what happens to angular velocty

Answer 19

increases

Question 20

What happers to angular momentum, angular velocity and moment of intertia when moving mass further away from the axis of rotation

Answer 20

AM = same, AV = decreases and MOI = increases

Question 21

What happers to angular momentum, angular velocity and moment of intertia when bringing mass closer to the axis of rotation

Answer 21

AM = same, AV = increases and MOI = decreases

Question 22

What biomechanical principle refers to strongest and largest body parts first, use as many body parts as possible, transferring momentum from one body part to another when at maximum velocity, ensuring an appropriate follow through to avoid unnecessary deceleration.

Answer 22

Sequential force summation