*64. GO A block is pressed against a vertical wall by a force P, as the drawing shows. This force can either push the block upward at a constant ve- locity or allow it to slide downward at a constant velocity. The magnitude of the force is different in the two cases, while the directional angle 0 is the same. Kinetic friction exists between the block and the wall, and the coefficient of kinetic friction is 0.250. The weight of the block is 39.0 N, and the directional angle for the force P is 0 = 30.0°. Determine the magnitude of P when the block slides (a) up the wall and (b) down the wall.

*64. GO A block is pressed against a vertical wall by a force P, as the drawing shows. This force can either push the block upward at a constant ve- locity or allow it to slide downward at a constant velocity. The magnitude of the force is different in the two cases, while the directional angle 0 is the same. Kinetic friction exists between the block and the wall, and the coefficient of kinetic friction is 0.250. The weight of the block is 39.0 N, and the directional angle for the force P is 0 = 30.0°. Determine the magnitude of P when the block slides (a) up the wall and (b) down the wall.

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Question

*64. GO A block is pressed against a vertical wall
by a force P, as the drawing shows. This force
can either push the block upward at a constant ve-
locity or allow it to slide downward at a constant
velocity. The magnitude of the force is different
in the two cases, while the directional angle 0 is
the same. Kinetic friction exists between the block
and the wall, and the coefficient of kinetic friction
is 0.250. The weight of the block is 39.0 N, and
the directional angle for the force P is 0 = 30.0°.
Determine the magnitude of P when the block slides (a) up the wall and
(b) down the wall.

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