# Why Does A Ballerina Speed Up When She Pulls In Her Arms

This post categorized under Vector and posted on July 22nd, 2018.

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When she pulls her arms in she is doing work by more than counteracting this force and this is what makes her spin faster. This is due to the fact that the spin velocity is related to the effort that the ballerina makes in pulling in her arms.Why does a ballerina speed up when she pulls This is due to the fact that the spin velocity is related to the effort that the ballerina makes in pulling in her arms.Why does a spinning ice skater pull her arms close and extend them A skater will pull hisher arms in close to their body while spinning to increase the speed and force of the spin in routines this also helps to improve the fluency of the rou tine and is able to keep going in time to the music.

The principle of conservation of momentum states In the absence of external forces or torques acting on an object or system of objects the total momentum of a system will remain constant. To get the carousel spinning the students exert external torques on it thus speeding it up.Then she rotates really fast when she pulls her arms to her sides. This is an example of a fundamental law in physics called Conservation of Angular Momentum. This law relates two observable quanvectories the speed of rotation and the shape.Spinning takes energy. The momentum built up by a spinning figure skater is that same whether they have their limbs extended or pulled in towards their body but with their arms extended their mvector extends further from their center

A hoop a uniform disk and a uniform sphere all with the same mvector and outer radius start with the same speed and roll without sliding up identical inclines. Rank the objects according to how high they go least to greatest.