A 30 cm long cord is wrapped around the edge of an engine starter that has the same moment of inertia as a hoop. The mass of the starter is 450 g and a radius of 6 cm. If the cord starts from rest and is pulled completely off in 7 seconds, what torque is delivered to the starter?

A 30 cm long cord is wrapped around the edge of an engine starter that has the same moment of inertia as a hoop. The mass of the starter is 450 g and a radius of 6 cm. If the cord starts from rest and is pulled completely off in 7 seconds, what torque is delivered to the starter?

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter10: Fixed-axis Rotation

Section: Chapter Questions

Problem 87P: A constant torque is applied to a rigid body whose moment of inertia is 4.0kgm2 around the axis of...

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Question

A 30 cm long cord is wrapped around the edge of an engine starter that has the same
moment of inertia as a hoop. The mass of the starter is 450 g and a radius of 6 cm. If the
cord starts from rest and is pulled completely off in 7 seconds, what torque is delivered to
the starter?

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