Physics
7th Edition
ISBN: 9780321625915
Author: Douglas C. Giancoli
Publisher: PEARSON
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Textbook Question
Chapter 4, Problem 13MCQ
To pull an old stump out of the ground, you and a friend tie two ropes to the stump. You pull on it with a force of 500 N to the north while your friend pulls with a force of 450 N to the northwest. The total force from the two ropes is
- less than 950 N.
- exactly 950 N.
- more than 950 N.
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16
9. Three horizontal plastic ropes pull on a box which is stuck on the ground
producing vector forces: A. B and C as shown. Find the magnitude and
direction of the fourth force that will make the vector sum of the forces zero
B = 40 N
A 50 N
30°
60°
= 20 N
Figure 20
Ans. 57.2N, 56.3° below -x-axis
Two ropes apply a force to a boat. The first is 400 N in the positive x direction, and the second is 200 N in the positive y direction. At what angle must a third rope tension be applied in order to keep the boat at rest
( 45 a
M > 1:0Y
HW1.pdf >
Chapter 1
HW1
Exercises
1. A force P = 800 N is shown in Fig.
a. Find the y-component of P with respect to x and y axis.
b. Find the y'-component of P with respect to x' and y' axis.
c. Find the y-component of P with respect to x' and y axis.
d. Find the y'-component of P with respect to x and y' axis.
P = 800 N
X'
2. A block is resting on an incline of slope 5:12 as shown in Fig. It is
subjected to a force F = 500 N on a slope of 3:4. Determine the
components of F parallel and perpendicular to the incline.
F = 500 N
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