EBK UNDERSTANDING OUR UNIVERSE (THIRD E
3rd Edition
ISBN: 9780393631760
Author: Blumenthal
Publisher: VST
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Chapter 1.2, Problem 1.2CYU
To determine
Whether the law of physics at two different places in the Universe is same or not.
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Consider the truss shown in the figure, built from three struts attached by three pins. The truss supports a downward force of F = 1,080 N applied at the point B. Assume the mass of the truss is negligible, the pins are frictionless, and the supports at A and C are also frictionless.
01
F
B
nc
02
C
(a) Assuming 0₁ = 26.0° and 0 2 = 51.0°, what are n and n? (Enter the magnitudes in N.)
ΠΑ
пс
=
=
N
N
(b) The force any strut applies on a pin must be directed along the length of the strut as a force of tension or compression. What are the directions of the forces that the struts exert on the pins joining them?
strut AB on joint A:
---Select---
strut AB on joint B:
strut BC on joint B:
strut BC on joint C:
strut AC on joint A:
strut AC on joint C:
|---Select---
--Select---
--Select---
--Select---
|---Select---
✓
✓
✓
Find the force of tension or of compression (in N) in each of the three struts.
bar AB
N
N
bar BC
bar AC
N
The center of mass of the arm shown in the figure is at point A. Find the magnitudes (in N) of the tension force F+ and the force Fs which hold the arm in equilibrium. (Let = 22.5°.) Assume the weight of the arm is 34.8 N.
N
|Fsl
N
F
8.00 cm
-29.0 cm
i
Hi,
Please type the whole transcript correctly using comma and periods and as needed. Please mention the name of each scientist says. The picture of a video on YouTube has been uploaded down.
Chapter 1 Solutions
EBK UNDERSTANDING OUR UNIVERSE (THIRD E
Ch. 1.1 - Prob. 1.1CYUCh. 1.2 - Prob. 1.2CYUCh. 1.3 - Prob. 1.3CYUCh. 1 - Prob. 1QAPCh. 1 - Prob. 2QAPCh. 1 - Prob. 3QAPCh. 1 - Prob. 4QAPCh. 1 - Prob. 5QAPCh. 1 - Prob. 6QAPCh. 1 - Prob. 7QAP
Ch. 1 - Prob. 8QAPCh. 1 - Prob. 9QAPCh. 1 - Prob. 10QAPCh. 1 - Prob. 11QAPCh. 1 - Prob. 12QAPCh. 1 - Prob. 13QAPCh. 1 - Prob. 14QAPCh. 1 - Prob. 15QAPCh. 1 - Prob. 16QAPCh. 1 - Prob. 17QAPCh. 1 - Prob. 18QAPCh. 1 - Prob. 19QAPCh. 1 - Prob. 20QAPCh. 1 - Prob. 21QAPCh. 1 - Prob. 22QAPCh. 1 - Prob. 23QAPCh. 1 - Prob. 24QAPCh. 1 - Prob. 25QAPCh. 1 - Prob. 26QAPCh. 1 - Prob. 27QAPCh. 1 - Prob. 28QAPCh. 1 - Prob. 29QAPCh. 1 - Prob. 30QAPCh. 1 - Prob. 31QAPCh. 1 - Prob. 32QAPCh. 1 - Prob. 34QAPCh. 1 - Prob. 35QAPCh. 1 - Prob. 36QAPCh. 1 - Prob. 37QAPCh. 1 - Prob. 38QAPCh. 1 - Prob. 39QAPCh. 1 - Prob. 40QAPCh. 1 - Prob. 41QAPCh. 1 - Prob. 42QAPCh. 1 - Prob. 43QAPCh. 1 - Prob. 44QAPCh. 1 - Prob. 45QAP
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