You open a door pushing it at 0.40 m from the axis of rotation, perpendicularly to the door. The door is 31 kg and has a width of 0.45 m, your force is 23 N. How long does it take to rotate the door to 60 degrees from zero (closed)? Express your answer with the appropriate units.

You open a door pushing it at 0.40 m from the axis of rotation, perpendicularly to the door. The door is 31 kg and has a width of 0.45 m, your force is 23 N. How long does it take to rotate the door to 60 degrees from zero (closed)? Express your answer with the appropriate units.

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 120AP: A grindstone with a mass of 50 kg and radius 0.8 m maintains a constant rotation rate of 4.0 rev/s...

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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.

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You open a door pushing it at 0.40 m from the axis of rotation, perpendicularly to the door. The door is 31 kg and has a
width of 0.45 m, your force is 23 N. How long does it take to rotate the door to 60 degrees from zero (closed)?
Express your answer with the appropriate units.

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