full transcript

## Unscramble the Blue Letters

The other option is for the dancer to bring her arms or leg in closer to her body once she returns to pointe. Why does this work? Like every other turn in ballet, the fouetté is governed by aalngur mmtneoum, which is equal to the dancer's angular vtcieoly tmeis her rotational inertia. And except for what's lost to fiorictn, that angular momentum has to stay constant while the daecnr is on pointe. That's called coeriovtsnan of angular momentum. Now, rotational iinrtea can be thought of as a body's resistance to rotational motion. It increases when more mass is distributed further from the axis of rotation, and decreases when the mass is distributed closer to the axis of rotation. So as she brings her arms closer to her body, her raiottanol inertia shrinks. In oedrr to conserve angular momentum, her angular velocity, the speed of her turn, has to increase, allowing the same amount of stored momentum to crary her through mtpiulle turns. You've probably seen ice skaters do the same thing, spinning faster and faster by drawing in their arms and legs.

## Open Cloze

The other option is for the dancer to bring her arms or leg in closer to her body once she returns to pointe. Why does this work? Like every other turn in ballet, the fouetté is governed by _______ ________, which is equal to the dancer's angular ________ _____ her rotational inertia. And except for what's lost to ________, that angular momentum has to stay constant while the ______ is on pointe. That's called ____________ of angular momentum. Now, rotational _______ can be thought of as a body's resistance to rotational motion. It increases when more mass is distributed further from the axis of rotation, and decreases when the mass is distributed closer to the axis of rotation. So as she brings her arms closer to her body, her __________ inertia shrinks. In _____ to conserve angular momentum, her angular velocity, the speed of her turn, has to increase, allowing the same amount of stored momentum to _____ her through ________ turns. You've probably seen ice skaters do the same thing, spinning faster and faster by drawing in their arms and legs.

## Solution

1. times
2. velocity
3. dancer
4. momentum
5. multiple
6. angular
7. rotational
8. friction
9. order
10. conservation
11. carry
12. inertia

## Original Text

The other option is for the dancer to bring her arms or leg in closer to her body once she returns to pointe. Why does this work? Like every other turn in ballet, the fouetté is governed by angular momentum, which is equal to the dancer's angular velocity times her rotational inertia. And except for what's lost to friction, that angular momentum has to stay constant while the dancer is on pointe. That's called conservation of angular momentum. Now, rotational inertia can be thought of as a body's resistance to rotational motion. It increases when more mass is distributed further from the axis of rotation, and decreases when the mass is distributed closer to the axis of rotation. So as she brings her arms closer to her body, her rotational inertia shrinks. In order to conserve angular momentum, her angular velocity, the speed of her turn, has to increase, allowing the same amount of stored momentum to carry her through multiple turns. You've probably seen ice skaters do the same thing, spinning faster and faster by drawing in their arms and legs.

## Frequently Occurring Word Combinations

### ngrams of length 2

collocation frequency
angular momentum 3
rotational inertia 3
black swan 2
stored momentum 2

## Important Words

1. allowing
2. amount
3. angular
4. arms
5. axis
6. ballet
7. body
8. bring
9. brings
10. called
11. carry
12. closer
13. conservation
14. conserve
15. constant
16. dancer
17. decreases
18. distributed
19. drawing
20. equal
21. faster
22. fouetté
23. friction
24. governed
25. ice
26. increase
27. increases
28. inertia
29. leg
30. legs
31. lost
32. mass
33. momentum
34. motion
35. multiple
36. option
37. order
38. pointe
39. resistance
40. returns
41. rotation
42. rotational
43. shrinks
44. skaters
45. speed
46. spinning
47. stay
48. stored
49. thought
50. times
51. turn
52. turns
53. velocity
54. work