One way to store energy is in the rotational motion of a flywheel, and some have proposed using such technology to power automobiles. One unit is based on a 7.0-kg flywheel in the shape of a hoop of radius 0.11 m that spins as fast as 70000 rpm.Part AHow much kinetic energy is stored by the flywheel when it is rotating at its maximum rate?Express your answer to two significant figures and include appropriate units.Templates Symbols undo redo reset keyboard shortcuts help,ValueUnitsSubmitPart BRequest AnswerIf the vehicle requires an average power of 11 kW under normal driving conditions, for how much time can it operate with the energy stored in the flywheel?Express your answer to two significant figures and include appropriate units.ATemplates Symbols undo redo reset keyboard shortcuts help,ValueUnits

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One way to store energy is in the rotational motion of a flywheel, and some have proposed using such technology power automobiles. One unit is based on a 7.0-kg flywheel in the shape of a hoop of radius 0.11 Part A How much kinetic energy is stored by the flywheel when it is rotating at its maximum rate? Express your answer to two significant figures and include appropriate units. Template Symbols undo redo resat keyboard shortcuts help, Value Submit Part B Units Request Answer If the vehicle requires an average power of 11 kW under normal driving conditions, for Express your answer to two significant figures and include appropriate units. Template Symbols undo redo reset keyboard shortcuts help, Value Units much time can it operate with the energy stored in the flywheel? that spins as fast as 70000 rpm,

One way to store energy is in the rotational motion of a flywheel, and some have proposed using such technology power automobiles. One unit is based on a 7.0-kg flywheel in the shape of a hoop of radius 0.11 Part A How much kinetic energy is stored by the flywheel when it is rotating at its maximum rate? Express your answer to two significant figures and include appropriate units. Template Symbols undo redo resat keyboard shortcuts help, Value Submit Part B Units Request Answer If the vehicle requires an average power of 11 kW under normal driving conditions, for Express your answer to two significant figures and include appropriate units. Template Symbols undo redo reset keyboard shortcuts help, Value Units much time can it operate with the energy stored in the flywheel? that spins as fast as 70000 rpm,

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter13: Rotation Ii: A Conservation Approach

Section: Chapter Questions

Problem 31PQ: Sophia is playing with a set of wooden toys, rolling them offthe table and onto the floor. One of...

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Sophia is playing with a set of wooden toys, rolling them offthe table and onto the floor. One of the toys is a small spherewith a mass of 0.024 kg and a radius of 0.020 m, and another isa small cylinder that also has a mass of 0.024 kg but a radius of0.013 m. She rolls each toy so that it has the same translationalspeed of 0.40 m/s. How much greater is the kinetic energy ofthe cylinder than the kinetic energy of the sphere?
One way to store energy is in the rotational motion of a flywheel, and some have proposed using such technology to power automobiles. One unit is based on a 7.0-kg flywheel in the shape of a hoop of radius 0.12 m that spins as fast as 50000 rpm A. How much kinetic energy is stored by the flywheel when it is rotating at its maximum rate? Express your answer to two significant figures and include appropriate units. B. If the vehicle requires an average power of 13 kW under normal driving conditions, for how much time can it operate with the energy stored in the flywheel? Express your answer to two significant figures and include appropriate units.
Consider a motor that exerts a constant torque of 25.0 N⋅m to a horizontal platform whose moment of inertia is 50.0 kg⋅m2. Assume that the platform is initially at rest and the torque is applied for 12.0 rotations. Neglect friction. A. How much work W does the motor do on the platform during this process? =1885 J B. What is the rotational kinetic energy of the platform Krot,f at the end of the process described above? Enter your answer in joules to four significant figures.
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