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Ps 103 Exam 3 Review questions and answers certified 2024
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Ps 103 Exam 3 Review questions and answers certified 2024
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Ps 103 Exam 3 ReviewCalculate the angular speed about the rotational axis of the Earth for a person
standing on the surface? - correct answer ✔7.3x10^-5
unknown 1 - correct answer ✔unknown 1
A circular disk is rotating about a central axis with an angular velocity which is
increasing at a constant rate. Point 1 on the disk is located at a distance r1
from the center of the disk and point 2 on the disk is located at a distance r2
from the center of the disk. If r2 = 2r1, which of the following ratios is the
largest? 1 and 2 refer to being at points 1 and 2 in the subscripts below, all
values occurring at the same time. - correct answer ✔ac2/ac1
An automobile accelerates from zero to 36.72 m/s in 6.80 s. The wheels have
a diameter of 0.450 m. What is the average angular acceleration of each
wheel? - correct answer ✔24
Convert 2800 rev/min in rad/s - correct answer ✔293.2
A 0.12-m-radius grinding wheel takes 6.0 s to speed up from 2.0 rad/s to 11.0
rad/s. What is the wheel's average angular acceleration? - correct answer
✔1.5
A Ferris wheel starts from rest and builds up to a final angular speed of 1.9
rad/s while rotating through an angular displacement of 4.9 rad. What is its
average angular acceleration? - correct answer ✔0.37
, A fan blade, initially at rest, rotates with a constant acceleration of 0.025
rad/s2 . What is its angular speed at the instant it goes through an angular
displacement of 7.00 rad? - correct answer ✔0.59
A ceiling fan is turned on and reaches an angular speed of 120 rev/min in 20.0
s. It is then turned off and coasts to a stop in 40.0 s. In the 60.0 s of rotation,
through how many revolutions did the fan turn? - correct answer ✔-2
A Ferris wheel, rotating initially at an angular speed of 0.500 rad/s,
accelerates over a 10.4-s interval at a rate of 0.040 0 rad/s2 . What angular
displacement does the Ferris wheel undergo in this 10.4-s interval? - correct
answer ✔7.36
11. 0.30-m-radius automobile tire rotates how many rad after starting from rest
and accelerating at a constant 2.0 rad/s2 over a 5.0-s interval? - correct
answer ✔25 rad
12. A point on the rim of a 0.30-m-radius rotating wheel has a tangential
speed of 5.0 m/s. What is the tangential speed of a point 0.20 m from the
center of the same wheel? - correct answer ✔3.3
13. A 0.150-m-radius grinding wheel starts at rest and develops an angular
speed of 12.00 rad/s in 7.80 s. What is the average tangential acceleration of
a point on the wheel's edge? - correct answer ✔0.23
14. Consider a point on a bicycle wheel as the wheel turns about a fixed axis,
neither speeding up nor slowing down. Compare the linear and angular
velocities of the point. - correct answer ✔B. Only the angular velocity is
constant
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