Problem 2.11 As shown in Fig. 2.23, consider a block that weighs W. Due to the effect of gravity, the block is sliding down a slope that makes an angle 0 with the horizontal. The coefficient of kinetic friction between the block and the slope is . Show that the magnitude of the frictional force generated between the block and the slope is f = W cos 0. a block surface. een the inimum e right?
Problem 2.11 As shown in Fig. 2.23, consider a block that weighs W. Due to the effect of gravity, the block is sliding down a slope that makes an angle 0 with the horizontal. The coefficient of kinetic friction between the block and the slope is . Show that the magnitude of the frictional force generated between the block and the slope is f = W cos 0. a block surface. een the inimum e right?
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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![Problem 2.11 As shown in Fig. 2.23, consider a block that
weighs W. Due to the effect of gravity, the block is sliding
down a slope that makes an angle 0 with the horizontal.
The coefficient of kinetic friction between the block and the
slope is .
Show that the magnitude of the frictional force generated
between the block and the slope is f = Hx W cos 0.
der a block
W
tal surface.
petween the
ne minimum
rd the right?
Fig. 2.23 Problem 2.11
der a block
is trying to
qurface by apply-
of externally
blom ? 12 As shown in Fig. 2.24, a person](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Ffb1f068f-280b-4fae-aadc-4386dd571312%2F52bc70de-8d20-4dae-9da5-5ccb33c964e3%2Fk7up5aj_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Problem 2.11 As shown in Fig. 2.23, consider a block that
weighs W. Due to the effect of gravity, the block is sliding
down a slope that makes an angle 0 with the horizontal.
The coefficient of kinetic friction between the block and the
slope is .
Show that the magnitude of the frictional force generated
between the block and the slope is f = Hx W cos 0.
der a block
W
tal surface.
petween the
ne minimum
rd the right?
Fig. 2.23 Problem 2.11
der a block
is trying to
qurface by apply-
of externally
blom ? 12 As shown in Fig. 2.24, a person
![Problem 3.4 Figure 3.32 illustrates a simplified version of a
hamstring strength training system for rehabili tation and
athlete training protocols. From a scated position, a patient
or athlete flexes the lower leg against a set resistance provided
through a cylindrical pad that is attached to a load. For
the position illustrated, the lower leg makes an angle 0 with
the horizontal. Point O represents the knee joint, point A is
the center of gravity of the lower leg, W is the total weight of
the lower leg, F is the magnitude of the force applied by the
pad on the lower leg in a direction perpendicular to the
a
Fig. 3.33 An athlete performing lower arm ex
Determine the net moment generat
joint, when the lower arm is extende
when the long axis of the lower arm
30° and f = 60°, respectively, with the
Answer:
Mnet (0=0°) =49.5 N-m; Mpet(0=30°)
Mpet (0=60°) =24.8 N-m.
W
Problem 3.6 Figure 3.34 illustrates
designed to test the strength of ma
illustrated, an intertrochanteric nail tha](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Ffb1f068f-280b-4fae-aadc-4386dd571312%2F52bc70de-8d20-4dae-9da5-5ccb33c964e3%2Fiquwilq_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Problem 3.4 Figure 3.32 illustrates a simplified version of a
hamstring strength training system for rehabili tation and
athlete training protocols. From a scated position, a patient
or athlete flexes the lower leg against a set resistance provided
through a cylindrical pad that is attached to a load. For
the position illustrated, the lower leg makes an angle 0 with
the horizontal. Point O represents the knee joint, point A is
the center of gravity of the lower leg, W is the total weight of
the lower leg, F is the magnitude of the force applied by the
pad on the lower leg in a direction perpendicular to the
a
Fig. 3.33 An athlete performing lower arm ex
Determine the net moment generat
joint, when the lower arm is extende
when the long axis of the lower arm
30° and f = 60°, respectively, with the
Answer:
Mnet (0=0°) =49.5 N-m; Mpet(0=30°)
Mpet (0=60°) =24.8 N-m.
W
Problem 3.6 Figure 3.34 illustrates
designed to test the strength of ma
illustrated, an intertrochanteric nail tha
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