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
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
Question 16
Transcribed Image Text:W Inat Is Is periou, IH SECUHUS ?
2. A
olono Inosnod n ni 200g am
16. A typical hard disk in a computer spins at 10000 rpm.
What is the frequency, in rev/s?
What is the period, in seconds?
17. A CD-ROM drive in a computer spins the 12-cm-diameter disks at 7300 rpm.
What is a disk's period in s?
What is a disk's frequency in rev/s?
18. The horse on a carousel is 4.1 m from the central axis. If the carousel rotates at 0.14 rev
it take the horse to go around twice?
How fast is a child on the horse going (in m/s)?
19. The radius of the earth's very nearly circular orbit around the sun is 1.50×10m.
Find the magnitude of the earth's velocity as it travels around the sun. Assume a year
Find the magnitude of the earth's centripetal acceleration as it travels around the sun.
365 days.
20. Modern wind turbines are larger than they appear, and despite their apparently lazy n
the blade's tips can be quite high-many times higher than the wind speed. A turbine E
that spin at 14 rpm.
At the tip of a blade, what is the speed?
At the tip of a blade, what is the centripetal acceleration?
23. To withstand "g-forces" of up to 10g, caused by suddenly pulling out of a steep dive
train on a "human centrifuge." 10g is an acceleration of 98 m/s².
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