Askater extends her arms horizontally, holding a 5-kg mass in each hand. she is rotating about a vertical axis with an angular velocity of one revolution per second. if she drops her hands to her sides, what will the final angular velocity (in rev/s) be if her moment of inertia remains approximately constant at 5 kg⋅m2, and the distance of the masses from the axis changes from 1 m to 0.1 m?

rev/s

Explanation:

 = mass attached to each hand = 5 kg

= initial distance of masses in each hand = 1 m

= final distance of masses in each hand = 0.1 m

= moment of inertia of body = 5 kgm²

= initial total moment of inertia =

= initial angular velocity = 1 rev/s

= final total moment of inertia =

= final angular velocity = ?

Using conservation of angular momentum

rev/s

force tends to be low and long diustance masses are high

elctricity and magnet is conversion to it