An ice skater pulls her arms in to increase her angular velo

An ice skater pulls her arms in to increase her angular velocity. states that angular momentum is conserved. Thus, her angular speed increases via the equation: l_1 omega_1 = l_2 omega_2 Cart states that energy is conserved. Thus, her angular speed increases via the equation: 1/2 t_2 omega 2/1 lessthanorequalto 1/2 t_2 omega^2_2 who is correct? Neither are correct. both are correct. only carl is correct. only leo is correct. Kate is correct.

Solution

Option d only leo is correct

It causes only onservation of angular momentum. Reducing air resistance won\'t cause her to speed up without an external force.

Like linear momentum (mv), angular momentum (r×mv) is a conserved quantity, where r is the vector from the center of rotation. For a skater holding a static pose, for each particle making up her body, the contribution in magnitude to the total angular momentum is given by mirivi. Thus bringing in her arms reduces ri for those particles. In order to conserve angular momentum, there is then an increase in the angular velocity.