Alex is asked to move two boxes of books in contact with each other and resting on a rough floor. He decides to move them at the same time by pushing on box A with a horizontal pushing force F, = 9.3 N. Here A has a mass m, = 10.6 kg and B has a mass m, = 7.0 kg. The contact force between the two boxes is F.. The coefficient of kinetic friction between the boxes and the floor is 0.02. (Assume F, acts in the +x direction.) (a) What is the magnitude (in m/s2) of the acceleration of the two boxes? m/s2 (b) What is the force exerted on m, by m,? In other words what is the magnitude (in N) of the contact force F,? (c) If Alex were to push from the other side on the 7.0-kg box, what would the new magnitude (in N) of F. be?

Alex is asked to move two boxes of books in contact with each other and resting on a rough floor. He decides to move them at the same time by pushing on box A with a horizontal pushing force F, = 9.3 N. Here A has a mass m, = 10.6 kg and B has a mass m, = 7.0 kg. The contact force between the two boxes is F.. The coefficient of kinetic friction between the boxes and the floor is 0.02. (Assume F, acts in the +x direction.) (a) What is the magnitude (in m/s2) of the acceleration of the two boxes? m/s2 (b) What is the force exerted on m, by m,? In other words what is the magnitude (in N) of the contact force F,? (c) If Alex were to push from the other side on the 7.0-kg box, what would the new magnitude (in N) of F. be?

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter5: Newton's Laws Of Motion

Section: Chapter Questions

Problem 40PQ: A sleigh is being pulled horizontally by a train of horses at a constant speed of 8.05 m/s. The...

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Alex is asked to move two boxes of books in contact with each other and resting on a rough floor. He decides to move them at the same time by pushing on box A with a horizontal pushing force F, = 9.1 N. Here A has a mass m, = 10.2 kg and B has a mass m, = 7.0 kg. The contact force between the two boxes is F.. The coefficient of kinetic friction between the boxes and the floor is 0.02. (Assume F, acts in the +x direction.) F, (a) What is the magnitude (in m/s?) of the acceleration of the two boxes? 0.56 Did you draw three free-body diagrams, one for each box and one for the two boxes combined and identify the forces acting on each system? What is the system of interest here for finding the acceleration of the two boxes? m/s? (b) What is the force exerted on m, by m,? In other words what is the magnitude (in N) of the contact force F,? 5.292 What is the system of interest here for finding the contact force between the two boxes? N (c) If Alex were to push from the other side on the…
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