Angular Impulse Momentum - L24

Question 1

two things we need to know about angular momentum

Answer 1

1). once airborne, it is possible for the athlete to alter angular velocity by changing the moment of inertia.
2). when a body is rotating in the air, momentum is conserved.

Question 2

how is it possible to alter angular velocity ?

Answer 2

H = Iw. if we were to increase moment of inertia by bringing arms closer we would increase angular velocity.

Question 3

how is momentum conserved.

Answer 3

no external forces can be put on the object in air and because g acts through the CoM. as this only causes linear motion.