Reference 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 This question has multiple versions. Read carefully! A. B. A bike wheel, initially rotating counter-clockwise, experiences a constant counter- clockwise torque. Time Time Angular Velocity Angular Velocity Which angular velocity-time graph correctly describes the bike wheel's motion? Counter-clockwise is defined as positive. C. D. Time Time Angular Velocity Angular Velocity Finalize Check Answers Cannot Be SolvedThis question has multiple versions. Read carefully! An ice skater is spinning on the spot. Initally he has his arms close to his body, and then he puts his arms straight out away from his body, as shown in the image provided. How do his angular momentum and angular velocity change during the spin? Neglect friction. Angular Momentum Angular Velocity A. Constant Increase Constant Decrease Decrease Increase Decrease Decrease Before After Finalize Check Answers Unit 17: Rotational Dynamics, Review Using g = 10m/sz Keep 3+ sig figs Desmos CalculatorThis question has multiple versions. Read carefully! 90 A fidget spinner is initially spinning counter-clockwise with an initial angular momentum of 60kgm/s. A student then applies a torque to the fidget spinner over a 60 short period of time as described by the torque-time graph provided. 30 What is the final angular momentum of the fidget spinner? Neglect drag and friction. Counter-clockwise is defined as positive. Time (S) Torque (Nm) 0 012 0:4 0 6 0 8 1 1.2 A. 24kgm2/s B. 42kgm2/s -30 C. 57kgm2/s D. 78kgm2/s -60 -90 Finalize Check Answers Cannot Be Solved Unit 17: Rotational Dynamics, Review Using g = 10m/sz Keep 3+ sig figs Desmos CalculatorThis question has multiple versions. Read carefully! A student is experimenting with merry-go-rounds in the local park. In each case, the Case 1 Case 2 Case 3 Case 4 student runs at the same velocity and jumps onto a stationary merry-go-round. The 40cm mass of the merry-go-round is the same in all cases, but the radius of the merry-go- 40cm 80cm 80cm round and the path of the runner is different in each case, as shown in the image provided. In which case is the final angular momentum of the student-merry-go-round system the greatest? A. Case 4 B. Cases 1 and 3 C. Cases 2 and 4 D. Cases 3 and 4 200cm 100cm 200cm 100cm Finalize Check Answers Cannot Be Solved Unit 17: Rotational Dynamics, Review Using g = 10m/sz Keep 3+ sig figs Desmos CalculatorThis question has multiple versions. Read carefully! A scientist has designed a windmill with a moment of inertia approximated by the equation /3mrs. The scientist uses this design to build two windmills. Windmill B has half the mass and twice the radius of windmill A, as shown in the image provided. If both windmills are spinning with the same angular velocity, and windmill A has rotational kinetic energy E, what is windmill B's rotational kinetic energy? A. 1/2E B. E C. 2E D. 4E Windmill A Windmill B Finalize Check Answers Cannot Be Solved Unit 17: Rotational Dynamics, Review Using g = 10m/sz Keep 3+ sig figs Desmos Calculator