A ball and a cart of equal mass are released on identical tracks as shown. Assume ball rolls down the track without slipping. Neglect loss and the mass of the cart's Case A wheels. In which case does the object have a greater initial gravitational potential energy? In which case does the object have a greater final rotational kinetic energy? In which case does the object have a greater linear kinetic energy? In which case does the object reach the bottom of the track in a shorter time? Case B Finalize Check Answers Cannot Be SolvedAn ice-skating student is spinning as shown. In Case A, she has her arms extended and in Case B she has brought her arms crossed in front of her chest. In which case does the student have a greater angular momentum? Case A Case B In which case does the student have a greater moment of inertia? In which case does the student have a greater angular speed? Finalize Check Answers Cannot Be SolvedThis question has multiple versions. Read carefully! A student is experimenting with using additional masses to change the rotational inertia of a bike wheel, and then applying torques of different magnitudes. In trial 1, Trial 1 Trial 2 the bike wheel has rotational inertia I and experiences a torque t. The student determines that the wheel's angular acceleration is a. In trial 2, the bike wheel has rotational inertia 21 and experiences a torque 1/2t. What is the bike wheel's angular acceleration in trial 2? A. 1/4a B. 1/2a C. a D. 2a Finalize Check Answers Cannot Be SolvedThis 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 B. Constant Decrease Decrease Increase Decrease Decrease Before After Finalize Check Answers Cannot Be Solved