A dog sits at the center of a disk that is rotating at a constant rate. The dog slowly moves to the edge of the disk. Which of the following values doesn't change? Angular velocity Rotational inertia Rotational Kinetic Energy Angular momentum

A wheel is rotating clockwise as shown (by the arrow). Its rotation axis coincides with the x-axis. A torque that causes the wheel to slow down is best represented by the vector 1 O 2 O 3 4 21 5

The figure shows a graph of the angular velocity of a rotating wheel as a function of time. Although not shown in the graph, the angular velocity continues to increase at the same rate until t = 8.9 s. What is the angular displacement of the wheel from 0 to 8.9 s? +6.0 7 +3.0- 3.0 Time (s) 1.0 5.0 -3.0- -6,아 -9.0k Number Units the tolerance is +/-2% Click if you would like to Show Work for this question: Open Show Work Angular velocity (rad/s)

Question 13 An ice skater starts to spin with an angular velocity of 2 rotations per second, when she moves her arms close together her angular inertia goes down by a factor of 5, how fast would she rotate then? O 2/5 rotations per second O 5 rotations per second O 5/2 rotations per second O 10 rotations per second Question 14 What is the tangential velocity of a ladybug that is 20 cm from the center of a turntable rotating at 5 radians per second? Hint: Watch the units O 4 m/s O 1 m/s O 100 m/s O 0.04 m/s Question 15 What is the magnitude of the centripetal force keeping the ladybug of the above problem in circular motion? Use 2x10-5 kg for her mass. Hint: Watch the units O 1x104 N O 1x107 N 2x10 3 N O 1x105 N