5th Edition

ISBN: 9780321976444

Author: James S. Walker

Publisher: PEARSON

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Newton’s laws of motion describe the relationship between the motion of an object and forces acting on it. Newton’s law of motion has two types as follows:

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Textbook Question

Chapter 6, Problem 64GP

Predict/Calculate The blocks shown in Figure 6-64 are at rest. (a) Find the frictional force exerted on block A given that the mass of block A is 8.82 kg, the mass of block B is 2.33 kg and the coefficient of static friction between block A and the surface on which it rests is 0.320. (b) If the mass of block A is doubled does the frictional force exerted on it increase decrease, or stay the same? Explain.

Chapter 6, Problem 64GP, Predict/Calculate The blocks shown in Figure 6-64 are at rest. (a) Find the frictional force exerted

Figure 6-64

Problem 64

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Chapter 6, Problem 63GP

Chapter 6, Problem 65GP

Students have asked these similar questions

When an ice hockey puck weighing 90 g is stationary on the ice, a minimal force of 0.2 N is required to move it. a) Calculate the coefficient of static friction. b) If the puck covers the first 10 cm in 0.5 s (while the 0.2 N force is still applied on the puck), calculate the kinetic friction coefficient.

Problem Two-block system is given below. The mass of block one is m=4 kg and the mass of block two is m, -8 kg A force is applied on m; to start the motion of block two knowing that block 1 doesn't move The coefficient of static friction for all surfaces is given as 0.4 (Take g-9.8 m/s). Tension force Fapplied m. Calculate the magnitude of the maximum static friction force Fel exerted by the ground surtace on block 2 Calculate the magnitude of the applied force |Fa that is needed just to start the motion ot the block 2 IFnta

SELF ASSESSMENT (A) A student presses a book between his hands, as figure A indicates. The forces that he exerts on the front and back covers of the book are perpendicular to the book and are horizontal. The book weighs 31 N. The coefficient of static friction between his hands and the book is 0.40. To keep the book from falling, calculate is the magnitude of the minimum pressing force that each hand must exert. (Ans: 39N) 4 Fig. A

Chapter 6 Solutions

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