COLLEGE PHYSICS
2nd Edition
ISBN: 9781464196393
Author: Freedman
Publisher: MAC HIGHER
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Chapter 5, Problem 42QAP
To determine
In this problem we have to determine mass of the object.
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The uniform crate has a mass of 150 kg. If the coefficient of static friction between the crate and the floor is us = 0.2, determine the smallest mass of the man so he can move the crate. The coefficient of static friction between his shoes and the floor is us = 0.45.
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Chapter 5 Solutions
COLLEGE PHYSICS
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- If you press a book flat against a vertical wall with your hand, in what direction is the friction force exerted by the wall on the book? (a) downward (b) upward (c) out from the wall (d) into the wall.arrow_forwardA block of ice (m = 15.0 kg) with an attached rope is at rest on a frictionless surface. You pull the block with a horizontal force of 95.0 N for 1.54 s. a. Determine the magnitude of each force acting on the block of ice while you are pulling. b. With what speed is the ice moving after you are finished pulling? Repeat Problem 71, but this time you pull on the block at an angle of 20.0.arrow_forward8-63. Determine the smallest force P that will cause impending motion. The crate and wheel have a mass of 50 kg and 25 kg, respectively. The coefficient of static friction between the crate and the ground is , = 0.2, and between the wheel and the ground, = 0.5. *8-64. Determine the smallest force P that will cause impending motion. The crate and wheel have a mass of 50 kg and 25 kg. respectively. The coefficient of static friction between the crate and the ground is , = 0.5, and between the wheel and the ground μ = 0.3. O O O 127 10 L C A 300 mmarrow_forward
- Question 7 A 81.17 kg crate is on a frictionless surface inclined at an angle of 0 = 28.64°. A constant external force, P, is applied horizontally to the crate such that it moves a distance of 3.00 m up the incline at constant speed. What is the magnitude of the force P? (740) %3D P. 3.0 m A) O1303.27 N B) O381.27 N C) 0434.42 N D) O14.09 N E) 698.14 N Review Laterarrow_forward5) A 640-N hunter gets a rope around a 3200-N polar bear. They are initially stationary, 20 meters apart, on frictionless level ice. The hunter now pulls on the rope such that she and the polar bear slide closer together. This continues until they eventually meet at some point on the ice. What total distance will the polar bear have slid? a) 1.0 m b) 3.3 m c) 10 m d) 12 m e) 17 marrow_forward1. Consider the forces acting on these three changes and list in order of the magnitude of the force starting with the smallest. A --- r B -4 +q +q Find FA Find Fa Find Fe List in order of the magnitudearrow_forward
- Estimate the height of a typical playground slide and theangle its surface makes with the horizontal. A child wearing a different sort of clothing than the first child climbs the ladder to the top of the slide, sits on the slide, lets go of the handrail, and remains at rest. What is the minimum possible value for the coefficient of static friction between this child and the surface of the slide?arrow_forwardA) A woman exerts a constant horizontal force on a large box. As a result, the box moves across a horizontal floor at a constant speed "v0". The constant horizontal force applied by the woman: has the same magnitude as the weight of the box. is greater than the weight of the box. has the same magnitude as the total force which resists the motion of the box. is greater than the total force which resists the motion of the box. is greater than either the weight of the box or the total force which resists its motion. B) If the woman in the previous question doubles the constant horizontal force that she exerts on the box to push it on the same horizontal floor, the box then moves: with a constant speed that is double the speed "v0" in the previous question. with a constant speed that is greater than the speed "v0" in the previous question, but not necessarily twice as great. for a while with a speed that is constant and greater than the speed "v0" in the previous question, then with a…arrow_forward3- The student pushes horizontally on a 37 kg box with a force of 115 N. The coefficient friction between the box and the floor is 0.37. What is the frictional force on the crate from the floor? a- 115 b- 230 c-110 d-121arrow_forward
- A crate remains stationary after it has been placed on a ramp inclined at an angle with the horizontal. Which of the following statements must be true about the magnitude of the frictional force that acts on the crate? O It is least equal to the weight of the crate. O It is equal to n. O It is larger than the weight of the crate. O It is greater than the component of the gravitational force acting down the ramp. O It is equal to the component of the gravitational force acting down the ramp.arrow_forwardReview 9A Math textbook weighing 1.0 kg and a Physics textbook weighing 1.2kg are stacked on top of each other on a table. A horizontal force of 5.5 N is applied to the bottom book. Kinetic friction between the bottom book and the table top is 1.5 N. Friction between the two books is 0.88N. a) What is the normal force acting on both books by the table top? b) What is the net force in the horizontal direction? c) What is the acceleration of the stack of books?arrow_forwardPRINTER VERSION 4 ВАСК NEXT Z Your answer is partially correct. Try again. A 2.70 kg block is initially at rest on a horizontal surface. A horizontal force F of magnitude 5.98 N and a vertical force P are then applied to the block (see the figure). The coefficients of friction for the block and surface are us = 0.4 and u = 0.25. Determine the magnitude of the frictional force acting on the block if the magnitude of P is (a)10.0 N and (b)14.0 N. (The upward pull is insufficient to move the block vertically.) m em em (a) Number 5.9 Units em lem (b) Number T7.37 Units lem Click if you would like to Show Work for this question: Open Show Work lem plem SHOW HINT blem LINK TO TEXT LINK TO SAMPLE PROBLEM VIDEO MINI-LECTURE blem e here to search 7:12 PM ENG 4/4/2021 13) 17 pause break eno Pgup prt sc delete hon insert 115Pgdn %23 3 4 5. backspo 远arrow_forward
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