Tutorials in Introductory Physics
1st Edition
ISBN: 9780130970695
Author: Peter S. Shaffer, Lillian C. McDermott
Publisher: Addison Wesley
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Chapter 4.1, Problem 1eT
The diagrams at right show top and side views of the spinning wheel in part A.
On each diagram, draw a vector to represent the
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For this problem, refer to the figure on the right.
What is the direction of the angular acceleration of the disk shown?
-x axis
-z axis
-y axis
+z axis
+y axis
+x axis
Do only part B. After finding the gravitational torque, please also find the angular acceleration in part B.
The Subparts to be solved D & E.
The angular position of a rod varies as 23.7t2 radians from time
t = 0. The rod has two beads on it as shown in the following figure, one at
r1 = 15 cm from the rotation axis and the other at r2 = 42 cm from the rotation axis. (Note: figure may not be drawn to scale.)
(a) What is the instantaneous angular velocity (in rad/s) of the rod at
t = 7 s?
(Indicate the direction with the sign of your answer. Round your answer to at least one decimal place.)
rad/s
(b) What is the angular acceleration (in rad/s2) of the rod at
t = 7 s?
(Indicate the direction with the sign of your answer.)
rad/s2
(c) What are the tangential speeds of the beads (in m/s) at
t = 7 s?
vt, 1
= m/s
vt, 2
= m/s
(d) What are the tangential accelerations of the beads at
t = 7 s?
(Enter the magnitudes in m/s2.)
at, 1
= m/s2
at, 2
= m/s2
(e) What are the centripetal accelerations of the beads at
t = 7 s?
(Enter the magnitudes in m/s2.)
ac, 1
= m/s2
ac, 2
=…
Chapter 4 Solutions
Tutorials in Introductory Physics
Ch. 4.1 - Draw arrows on the diagram to represent the...Ch. 4.1 - Mark the position of each of the labeled points at...Ch. 4.1 - Suppose the wheel makes one complete revolution in...Ch. 4.1 - Would two observers on either side of a rotating...Ch. 4.1 - The diagrams at right show top and side views of...Ch. 4.1 - In the space at right sketch the position vectors...Ch. 4.1 - Let | in terms of |o| . 1. The wheel is made to...Ch. 4.1 - Suppose the wheel slows down uniformly, so that ||...Ch. 4.1 - A force of magnitude Fo is applied to point M as...Ch. 4.1 - Compare the magnitude of the net torque about the...
Ch. 4.2 - A ruler is placed on a pivot and held at an angle...Ch. 4.2 - Draw a free-body diagram for the ruler (after it...Ch. 4.2 - How would your free-body diagram change if the...Ch. 4.2 - Predict: which spool will reach the floor first....Ch. 4.2 - Obtain two spools and a ring stand. Use the...Ch. 4.2 - Consider the following discussion between three...Ch. 4.2 - Write down Newton’s second law for each spool....Ch. 4.3 - A T-shaped board of uniform mass density has two...Ch. 4.3 - Prob. 1bTCh. 4.3 - Attach day to the bottom left side of the board so...Ch. 4.3 - Prob. 2bTCh. 4.3 - C. Imagine that the T-shaped board (with no clay...
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