Bio mech Flashcards

You may prefer our related Brainscape-certified flashcards:
1
Q

Explain how a gymnast can alter the speed of rotation (angular velocity) during flight.

A
  1. Changing the shape of the body causes a change in speed
  2. Change in the moment of inertia leads to a change of angular velocity/speed/spin of rotation.
  3. Angular momentum remains constant (during rotation)
  4. Angular momentum = moment of inertia x angular velocity
  5. Angular momentum - the quantity of rotation/motion
  6. Angular velocity - the speed of rotation
  7. Moment of inertia - spread/distribution of mass around axis/reluctance of the body to move
  8. To slow down (rotation) gymnast increases the moment of inertia Achieved by extending body/opening out/or equivalent
  9. To increase speed (of rotation) gymnast decreases the moment of inertia. Achieved by tucking body/bringing arms towards the rotational axis
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What type of graph is this?

A. Distance /Time

B. Velocity/ time

C. Speed/time

D. None of the above.

A

A. Distance /Time

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