This 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 0.2 0:4 016 ol 1 1.2 A. 24kgm2/s B. 42kgm2/s -30 C. 57kgm2/s D. 78kgm2/s -60 y -90 Finalize Check Answers Cannot Be SolvedThis 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 40cm 80cm 80cm mass of the merry-go-round is the same in all cases, but the radius of the merry-go- 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 SolvedThis question has multiple versions. Read carefully! A scientist has designed a windmill with a moment of inertia approximated by the equation /3mr2. 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? O A. 1/2E B. E C. 2E D. 4E Windmill A Windmill B Finalize Check Answers Cannot Be SolvedThis question has multiple versions. Read carefully! A student is playing with a simple helicopter toy with a moment of inertia approximated by the equation 1/2mr2. The helicopter toy has mass m and radius r, and the student sets it spinning with initial angular velocity w. When released, the T helicopter toy reaches a maximum height h. If the radius of the helicopter toy remained the same, but the mass of the helicopter h toy was doubled and the initial angular velocity was tripled, what maximum height would it reach? Neglect drag. A. 4h B. 6h reference level C. 9h D. 36h v Finalize Check Answers Cannot Be Solved