The spool is supported on rollers A and B which rotate without friction. By exerting a force T= 350N, calculate the time to unwind 4m of cable, if it has m=600kg and ko= 1.2m (1=1/2*m*ko²). Neglect the mass of the cable being unwound and the mass of the rollers. 1 30° -1.5m0.8 m 0 -1m-

The spool is supported on rollers A and B which rotate without friction. By exerting a force T= 350N, calculate the time to unwind 4m of cable, if it has m=600kg and ko= 1.2m (1=1/2mko²). Neglect the mass of the cable being unwound and the mass of the rollers. 1 30° -1.5m0.8 m 0 -1m-

Glencoe Physics: Principles and Problems, Student Edition

1st Edition

ISBN:9780078807213

Author:Paul W. Zitzewitz

Publisher:Paul W. Zitzewitz

Chapter8: Rotational Motion

Section8.2: Rotational Dynamics

Problem 27PP

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Concept explainers

Angular speed, acceleration and displacement

Angular acceleration is defined as the rate of change in angular velocity with respect to time. It has both magnitude and direction. So, it is a vector quantity.

Angular Position

Before diving into angular position, one should understand the basics of position and its importance along with usage in day-to-day life. When one talks of position, it’s always relative with respect to some other object. For example, position of earth with respect to sun, position of school with respect to house, etc. Angular position is the rotational analogue of linear position.

Question

Physics
The spool is supported on rollers A and B
which rotate without friction. By exerting a
force T= 350N, calculate the time to unwind
4m of cable, if it has m=600kg and ko= 1.2m
(1=1/2*m*ko²). Neglect the mass of the cable
being unwound and the mass of the rollers.
1
30°
1.5 m
0.8 m
0
1m-
B

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