2. You are initially pushing a book across a level table at a constant velocity under the influence of kinetic friction.

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2 You Are Initially Pushing A Book Across A Level Table At A Constant Velocity Under The Influence Of Kinetic Friction 1 (145.33 KiB) Viewed 36 times

2. You are initially pushing a book across a level table at a constant velocity under the influence of kinetic friction. You are pushing the book parallel to the table. At t = 0 s, you reduce the magnitude of your force at a constant rate to o N over the course of 10 s. For the first 5 s of this time the book is still sliding, however during the last 5 s the block is at rest with respect to the table. Use a coordinate system such that the î points in the direction of the initial velocity vector. a. Which direction is the friction force? b. Sketch a graph of the x component of the friction force on the book. For the first 5 seconds it will be a kinetic friction force, but for the last 5 seconds it will be a static friction force. C. Which direction is the acceleration? d. Sketch a graph of the x component of the acceleration of the book.