H.W. A cable is attached to the 20-kg plate B,passes over a fixed peg at C, and is attached to theblock at A. Using the coefficients of static frictionshown, determine the smallest mass of block A sothat it will prevent sliding motion of B down theplane.HA 0.2HB = 0.330H.W Blocks A and B have a mass of 7 kg and 10 kg,respectively. Using the coefficients of static frictionindicated, determine the largest vertical force P whichcan be applied to the cord without causing motion.300 mm400 mm= 04H.W The uniform thin pole has a weight of 50 N and alength of 26m. If it is placed against the rough wall andon the rough box in the position d = 10 m,us = 0.3 at points A, B and CP= 150 NBox weight = 100 NDetermine the distance x when the motion of the poleimpend26H.W.Determine the horizontal force P required to causeslippage to occur. The friction coefficients for thethree pairs of mating surfaces are indicated. The topblock is free to move vertically.100 kgH=0.6050 kgH=0.40H=D0.3020 kg

H.W. A cable is attached to the 20-kg plate B, passes over a fixed peg at C, and is attached to the block at A. Using the coefficients of static friction shown, determine the smallest mass of block A so that it will prevent sliding motion of B down the plane. HA=0.2 HB= 0.3 B. 30

H.W. A cable is attached to the 20-kg plate B, passes over a fixed peg at C, and is attached to the block at A. Using the coefficients of static friction shown, determine the smallest mass of block A so that it will prevent sliding motion of B down the plane. HA=0.2 HB= 0.3 B. 30

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 7.49P

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Question

H.W. A cable is attached to the 20-kg plate B,
passes over a fixed peg at C, and is attached to the
block at A. Using the coefficients of static friction
shown, determine the smallest mass of block A so
that it will prevent sliding motion of B down the
plane.
HA 0.2
HB = 0.3
30
H.W Blocks A and B have a mass of 7 kg and 10 kg,
respectively. Using the coefficients of static friction
indicated, determine the largest vertical force P which
can be applied to the cord without causing motion.
300 mm
400 mm
= 04
H.W The uniform thin pole has a weight of 50 N and a
length of 26m. If it is placed against the rough wall and
on the rough box in the position d = 10 m,
us = 0.3 at points A, B and C
P= 150 N
Box weight = 100 N
Determine the distance x when the motion of the pole
impend
26
H.W.
Determine the horizontal force P required to cause
slippage to occur. The friction coefficients for the
three pairs of mating surfaces are indicated. The top
block is free to move vertically.
100 kg
H=0.60
50 kg
H=0.40
H=D0.30
20 kg

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