AP Physics 1· difficulty 2/5
A figure skater spinning with arms extended pulls her arms in, reducing her moment of inertia to one-third of its original value. By what factor does her angular velocity change?
Explanation
No external torques → angular momentum is conserved. If , then .
Want 10 more like this — adaptive to your weak spots?
A disk (I = 0.20\text{kg·m}^2) spins at \omega0 = 6\text{rad/s}. A 0.50\text{kg} putty falls onto its rim at r = 0.30\text{m} and sticks. New angular speed?…
chevron_rightAngular momentum of a system is conserved when…
chevron_rightA disk with moment of inertia I1 = 4\text{ kg·m}^2 rotates at \omega1 = 6\text{ rad/s} about a vertical axis. A nonrotating disk with I2 = 2\text{ kg·m}^2 is dr…
chevron_right