3. An object has two rods attached to form a + sign. Each rod is 20-cm long and has a mass of 0.500 kg. A solid 0.2-kg sphere is attached at the end of each rod, of radius 5- cm. A) Calculate the moment of inertia of the object. B) If the device is initially at rest, and a torque of 3.00 m-N is applied to the object for 10.0 seconds, what will its angular momentum be? C) Use this and the answer to A) to calculate its angular speed, its average angular speed, and therefore the total angle it has rotated. D) What will its kinetic energy be? E) Show that this is equal to the work that the torque did.

3. An object has two rods attached to form a + sign. Each rod is 20-cm long and has a mass of 0.500 kg. A solid 0.2-kg sphere is attached at the end of each rod, of radius 5- cm. A) Calculate the moment of inertia of the object. B) If the device is initially at rest, and a torque of 3.00 m-N is applied to the object for 10.0 seconds, what will its angular momentum be? C) Use this and the answer to A) to calculate its angular speed, its average angular speed, and therefore the total angle it has rotated. D) What will its kinetic energy be? E) Show that this is equal to the work that the torque did.

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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Concept explainers

Torque

Torque is the rotational equivalent of linear force in physics and mechanics. Based on the course of study, it is also known as the moment of force, rotational force, or turning effect.

Question

3. An object has two rods attached to form a + sign. Each rod is 20-cm long and has a
mass of 0.500 kg. A solid 0.2-kg sphere is attached at the end of each rod, of radius 5-
cm.
A) Calculate the moment of inertia of the object.
B) If the device is initially at rest, and a torque of 3.00 m-N is applied to the object for
10.0 seconds, what will its angular momentum be?
C) Use this and the answer to A) to calculate its angular speed, its average angular speed,
and therefore the total angle it has rotated.
D) What will its kinetic
E) Show that this is equal to the work that the torque did.
energy
be?

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