The following information pertains to questions 1, 2, and 3. A workman pulls a sledacross an asphalt road using a rope at angle 0 above the horizontal direction. Theworkman pulls with 1,000[N] of force. The coefficients of friction of the sled withthe road are u=1.00 and µ=0.70. The sled has mass m. The sled is initially at rest.T710Q0[N].1) Which expression gives the magnitude of fmax for the situation illustrated above?A) mgB)mg – 1000cos(0)C)-mg + 1000cos(0)D) mg-1000sin(0)E) mg+ 1000sin(0)F) None of the above

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Glencoe Physics: Principles and Problems, Student Edition

1st Edition

ISBN:9780078807213

Author:Paul W. Zitzewitz

Publisher:Paul W. Zitzewitz

Chapter5: Displacement And Force In Two Dimensions

Section: Chapter Questions

Problem 8STP

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An object with a mass of 1.58 kg is initially at rest upon a horizontal, frictionless surface. An applied force of 4.79 N i acts on the object for 2.94 s. What is the object's final speed? Enter a number rounded to 2 decimal places and assume the answer has proper SI Units.
Two horses pull a cart with a total applied force of 1000N. The kinetic friction from the gravel road has a value of 375 N. Assuming the cart is 200kg, what is the acceleration of it?The road is flat and the horses are traveling in a straight path.
A desperate hiker has to think fast to help his friend who has fallen below him. Quickly, he ties a rope to a rock of mA = 405 kg and makes his way over the ledge (see the figure below). If the coefficient of static friction between the rock and the ground is H=0.348, and the mass of the hiker is ma= 70.1 kg, what is the maximum mass of the friend, mc, that the rock can hold so the hikers can then make their way up over the ledge? Assume the rope is parallel to the ground and the point where the rope passes over the ledge is frictionless. (ANS: 70.8 kg)
A desperate hiker has to think fast to help his friend who has fallen below him. Quickly, he ties a rope to a rock of mass ma and makes his way over the ledge (see the figure). If the coefficient of maximum static friction between the rock and the ground is µ, and the mass of the hiker is mâ, what is the maximum mass of the friend, mc, that the rock can hold so the hikers can then make their way up over the ledge? Assume the rope is parallel to the ground and the point where the rope passes over the ledge is frictionless. mc = Ju
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