Question

when sitting in a chair and spinning it why does the chair get faster when I bring my legs closer to my body and why does it become slower when I spread out my legs away from my body

Answer 1

Hey Friend

Its a question base on the concept of moment of Inertia. Its is bacause the distance decreases between the centre.

Answer 2

this is basically because of conservation of angular momentum

L=m×v×r

m is mass of the body
v is it's velocity
R is distance of the centre of the body till it stretches


now as L is constant r is inversely proportional to v


therefore if your legs are stretched your velocity will be lesser