Physics for Scientists and Engineers
6th Edition
ISBN: 9781429281843
Author: Tipler
Publisher: MAC HIGHER
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Chapter 4, Problem 59P
(a)
To determine
The tension in the cable and the normal force exerted by the incline.
(b)
To determine
The tension as a function of
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An object of mass 2.8 kg is suspended from a ceiling by two cords that each make an angle of magnitude 38.59 degrees with the ceiling. If the magnitudes of the
tensions In the two cords are the same.
what is the magnitude of the tension force in just one of the cords (in N)?
(My answer was 21.996 rounded to 22. I did T=(2.8)(9.8)/2Sin(38.59))
The magnitudes of the three forces are F1 = 1.6kN,F2 = 1.2kN and F3= 1.0kN. Compute their resulatant in the form (a) R=Rxi + Ryj+Rzkl and (b) R=Rλ
If we want to find the size of the force necessary to just barely overcome static friction (in which case fs=μsN), we use the condition that the sum of the forces in both directions must be 0. Using some basic trigonometry, we can write this condition out for the forces in both the horizontal and vertical directions, respectively, as:
Fcosθ−μsN=0
Fsinθ+N−mg=0
In order to find the magnitude of force F, we have to solve a system of two equations with both F and the normal force N unknown. Use the methods we have learned to find an expression for F in terms of m, g, θ, and μs (no N)
What are the steps to solve this?
Chapter 4 Solutions
Physics for Scientists and Engineers
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