Problem 4.9 Figure 4.56 illustrates a person who is trying to pull a block on a horizontal surface using a rope. The rope makes an angle 0 with the horizontal. If W is the weight of the block and u is the coefficient of maximum friction between the bottom surface of the block and horizontal surface, show that the magnitude P of minimum force the person must apply in order to overcome the frictional and gravitational effects (to start moving the block) is %3D cos 0+ u sin 0

Problem 4.9 Figure 4.56 illustrates a person who is trying to pull a block on a horizontal surface using a rope. The rope makes an angle 0 with the horizontal. If W is the weight of the block and u is the coefficient of maximum friction between the bottom surface of the block and horizontal surface, show that the magnitude P of minimum force the person must apply in order to overcome the frictional and gravitational effects (to start moving the block) is %3D cos 0+ u sin 0

International Edition---engineering Mechanics: Statics, 4th Edition

4th Edition

ISBN:9781305501607

Author:Andrew Pytel And Jaan Kiusalaas

Publisher:Andrew Pytel And Jaan Kiusalaas

Chapter7: Dry Friction

Section: Chapter Questions

Problem 7.50P: The block of weight W is pulled by the force P inclined at the angle to the horizontal. Find the...

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Question

point B.
Problem 4.9 Figure 4.56 illustrates a person who is trying
to pull a block on a horizontal surface using a rope.
The rope makes an angle 0 with the horizontal. If W is the
weight of the block and u is the coefficient of maximum Answer: T
Determ
force at pe
friction between the bottom surface of the block and
horizontal surface, show that the magnitude P of minimum
force the person must apply in order to overcome the
frictional and gravitational effects (to start moving the
block) is
P 3=
cos e+ u sin 0
Fig. 4.58 Probl
Fig. 4.56 Problem 4.9
Problem 4. 12
beam hinged to
is / 4.5 m and
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