Angular impulse and momentum Flashcards
Moment of inertia is what?
Resistance to change in angular motion
What affects it
Mass of object, distribution of that mass
What do you need to quantifyAngular momentum
Inertia and angular veloctiy
3 things that determine object angular momentum
Angular velocity, mass, distribution of mass
If no external moments, angular momentum is what?
Constant
why would putting your arms out do to angular momentum?
increase moment of inertia
Equation for angular impulse?
Mdeltat=Iwf-Iwi
What are the four principals of qualitative analysis
Direction of force application, impulse, summation of joint moments, continuity of joint moments
During the video about runners, what do short toes affec? what does the arch of the foot affect? Achilles?
Torque forces. Act as a spring17% energy. Spring, 35% stored.
Why are these springs important?
Because passive, no metabolic cost to operate
What purpose of glutes?
Stabilize trunk
What does nuchal ligament do?
Prevents head from shifting
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?
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 do you increase angular momentum
Increase angular impulse
