I need help on question 1. 5.1.3.An ice skater with her arms extended has a rotational inertia of 9.0 kg m²2 andspins at a rate of 1.0 revolution per second.(a) If she stays spinning in the same spot, what is her rotational kinetic energy?(b) What will her rate of rotation be when she pulls her arms in enough to reduce herrotational inertia to 2.5 kg m²?(c) Has her rotational kinetic energy changed in this process? If so, by how much?2.Two disks have the same axis of rotation. One is already spinning with frequency fin the horizontal plane when the second one is dropped onto it from above. If the disks havethe same radius but the bottom one is 3 times as massive as the top one, the final frequencywill be f. Why? (Be quantitative in your explanation.)astor doll[7.5 mIf r= 2.7 m and p = 270 kg m/s , what is rx p?04.A uniform, plastic meterstick of mass 48 g is set horizontally across the span betweentwo tables so that its center is located exactly midway between the tables and its ends arebarely on each table.(a) What is the magnitude of the force exerted by each table on the meterstick?(b) An 80 g mass is placed on the meterstick at the 80 cm mark. Now what is the magnitudeof the force exerted by each table on the meterstick?The formula for a thin spherical shell's rotational inertia about an axis that goesthrough its center is mr². If a spherical shell rolls without slipping across a surface, it willhave some total kinetic energy (both linear and rotational). Write an expression for this totalkinetic energy in terms of just the mass m and the linear velocity v (assuming it rolls withoutslipping). Explain or show how you get your answer.

Answered: Image /qna-images/answer/9848977b-f76e-47fc-9f10-0da3cee3f540.jpg

An ice skater with her arms extended has a rotational inertia of 9.0 kg m² and spins at a rate of 1.0 revolution per second. (a) If she stays spinning in the same spot, what is her rotational kinetic energy? (b) What will her rate of rotation be when she pulls her arms in enough to reduce her rotational inertia to 2.5 kg m²? (c) Has her rotational kinetic energy changed in this process? If so, by how much?

An ice skater with her arms extended has a rotational inertia of 9.0 kg m² and spins at a rate of 1.0 revolution per second. (a) If she stays spinning in the same spot, what is her rotational kinetic energy? (b) What will her rate of rotation be when she pulls her arms in enough to reduce her rotational inertia to 2.5 kg m²? (c) Has her rotational kinetic energy changed in this process? If so, by how much?

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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