Angular impulse and momentum Flashcards

1
Q

Moment of inertia is what?

A

Resistance to change in angular motion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What affects it

A

Mass of object, distribution of that mass

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What do you need to quantifyAngular momentum

A

Inertia and angular veloctiy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

3 things that determine object angular momentum

A

Angular velocity, mass, distribution of mass

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

If no external moments, angular momentum is what?

A

Constant

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

why would putting your arms out do to angular momentum?

A

increase moment of inertia

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Equation for angular impulse?

A

Mdeltat=Iwf-Iwi

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What are the four principals of qualitative analysis

A

Direction of force application, impulse, summation of joint moments, continuity of joint moments

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

During the video about runners, what do short toes affec? what does the arch of the foot affect? Achilles?

A

Torque forces. Act as a spring17% energy. Spring, 35% stored.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Why are these springs important?

A

Because passive, no metabolic cost to operate

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What purpose of glutes?

A

Stabilize trunk

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What does nuchal ligament do?

A

Prevents head from shifting

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

A diver jumps off a deck and tucks around ML axis. He wants to spin faster but just ends up dropping in the water like a cannon ball. what would he need to do?

A

Would need to create angular momentum or angular impulse. i.e would need to jump on an angle when jumping on the diving board.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

how do you increase angular momentum

A

Increase angular impulse

How well did you know this?
1
Not at all
2
3
4
5
Perfectly