Physics: Principles with Applications
7th Edition
ISBN: 9780321625922
Author: Douglas C. Giancoli
Publisher: Addison-Wesley
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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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Students have asked these similar questions
Problem 56. Your car is stuck in a mud hole. You are alone but have a long, strong rope. Having studied physics you tie
the rope tautly to a telephone pole and pull on it sideways as in the figure below.
A) Find the forces exerted by the rope on the car when 0 = 3° and you are pulling with a force of 400 N and the car
does not budge.
B) How strong must the rope be if it takes a force F of 600 N to move the car when 0 = 4°.
Pole
Car
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
Three men pull on ropes attached to the top of a heavy object which is level with the ground Man A is 6 ft. tall, stands 6 ft. away, 45 degrees NE from the center of the object and exerts a force of 12 lbs Man B is 5 ft 6 in tall 6 ft away, 60 degrees NW and pulls with a force of 60 His Man C is 5 ft fall, also stands 6 ft away, 30 degrees SE and pulls with a force of 80 lbs Assuming the topes are attached to their shoulders which are 2/3 of their height from the ground, what is the magnitude of the horizontal resultant (in lbs) of these forces on the object?
Chapter 4 Solutions
Physics: Principles with Applications
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Problem 21.
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