A skater can spin faster by pulling her arms closer to her body or spin slower by spreading her arms out from her body due to conservation of angular momentum.
What is conservation of angular momentum?
Conservation of angular momentum is a physical property of a spinning system such that its spin remains constant unless it is acted upon by an external force, or to put in another way, the speed of rotation is constant as long as net torque is zero.
Angular momentum, sometimes also referred to as spin, is determined by an object's mass, its velocity and distance of an object's mass from the point of rotation.
The nearer the mass is to its axis point or the more consolidated it is around that axis the greater its velocity.
Learn more about the conservation of angular momentum with the help of the given link:
Coulomb's Law: Force = k x q1x q2 divided distance square where k=9x10^9 , q1 and q2 are the charge So if you distance is halved, your force is stronger by 4 times and if you distance is doubled, your force is 1/4 Ask me again if you aren't clear :)
