Physics (5th Edition)
5th Edition
ISBN: 9780321976444
Author: James S. Walker
Publisher: PEARSON
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Textbook Question
Chapter 6, Problem 28PCE
Predict/Calculate The system shown in Figure 6-45 consists of two pulleys and two blocks. The pulleys each have a mass of 2.0 kg, the block on the left has a mass of 16 kg, and the block on the right has a mass m. The system is in equilibrium, and the string is massless. (a) Is the mass m greater than, less than, or equal to 16 kg? Explain. (b) Determine the mass m.
Figure 6-45
Problem 28
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QI) At point A, the four forces Fs, Fc, Fp and Fe act, the lines of action for these forces are
given by the straight lines AB, AC, AD and AF, as shown in Figure 1,
Coordinate the points are:
A
3
3
6.
2
D.
8
E
4
12
cm
em
Figure 1
The magnitudes of the forces are: F=7 KN, F= 3 KN, F= 9 KN and F= 13 KN.
Represent this force F acting on the point A as a Cartesian vector and determine its direction.
Replace the three forces shown by an equivalent force-couple system at point A. If the forces are replaced by a single resultant force,
determine the distance d below point A to its line of action.
230 N
420 mm
420 mm
130 N
420 mm
270 N
Answers:
Force-couple system at A. The force is positive if to the right, and the couple is positive if counterclockwise.
R =
i
N
M =
i
N-m
Single resultant force.
d =
i
mm
Q1) At point A, the four forces FB, Fc, Fp and FE act, the lines of action for these forces are
given by the straight lines AB, AC, AD and AE, as shown in Figure 1.
Coordinate the points are:
y
1
3
6.
1
7
12
cm
cm
cm
Figure 1
The magnitudes of the forces are: F=7 KN, F= 3 KN, Fp= 9 KN and F= 13 KN.
Represent this force F acting on the point A as a Cartesian vector and determine its direction.
O O + E
Chapter 6 Solutions
Physics (5th Edition)
Ch. 6.1 - A block rests on a rough, horizontal surface, as...Ch. 6.2 - When a mass is attached to a certain spring, the...Ch. 6.3 - Suppose the tension in the clothesline in Quick...Ch. 6.4 - Three boxes are connected by ropes and pulled...Ch. 6.5 - A system consists of an object with mass m and...Ch. 6 - A clothesline always sags a little, even if...Ch. 6 - In the Jurassic Park sequel, The Lost World, a man...Ch. 6 - When a traffic accident is investigated, it is...Ch. 6 - In a car with rear-wheel drive, the maximum...Ch. 6 - A train typically requires a much greater distance...
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