In this video you can see that the women is thrown up into the air at a small speed but gains tons of momentum when she is in the air by pulling her arms close together. This is has to do with angular momentum and rotational inertia. High rotational inertia means that most of the weight of an object is away from it's axis therefore making it hard for the object to turn. Low rotational inertia means most of the weight in near the center of the object making it easier to turn. This is when when she brings her arms in it adds weight to her axis therefore helping her turn more quickly, or lowering her rotational inertia. Angular momentum is when there are not many sharp angles on an object making it easier for it to turn or move quickly. This is also why when she draws her arms in she attempts to lay them as flat as possible on her chest, in order to have a lot of momentum by having not a lot of angles.
No comments:
Post a Comment