Forces on an inclined plane An object on an inclined plane does not slide, provided the component of the object’s weight parallel to the plane | W par | is less than or equal to the magnitude of the opposing frictional force | F r |. The magnitude of the frictional force, in turn, is proportional to the component of the object’s weight perpendicular to the plane | W perp | (see figure). The constant of proportionality is the coefficient of static friction μ > 0. Suppose a 100-lb block rests on a plane that is tilted at an angle of θ = 20° to the horizontal. a. Find | W par |and | W perp | ( Hint: it is not necessary to find W par and W perp first.) b. The condition for the block not sliding is | W par | < μ | W perp |. If μ = 0.65, does the block slide? c. What is the critical angle above which the block slides?
Forces on an inclined plane An object on an inclined plane does not slide, provided the component of the object’s weight parallel to the plane | W par | is less than or equal to the magnitude of the opposing frictional force | F r |. The magnitude of the frictional force, in turn, is proportional to the component of the object’s weight perpendicular to the plane | W perp | (see figure). The constant of proportionality is the coefficient of static friction μ > 0. Suppose a 100-lb block rests on a plane that is tilted at an angle of θ = 20° to the horizontal. a. Find | W par |and | W perp | ( Hint: it is not necessary to find W par and W perp first.) b. The condition for the block not sliding is | W par | < μ | W perp |. If μ = 0.65, does the block slide? c. What is the critical angle above which the block slides?
Solution Summary: The author explains the magnitude of the vectors W_par and
Forces on an inclined plane An object on an inclined plane does not slide, provided the component of the object’s weight parallel to the plane |Wpar| is less than or equal to the magnitude of the opposing frictional force |Fr|. The magnitude of the frictional force, in turn, is proportional to the component of the object’s weight perpendicular to the plane |Wperp| (see figure). The constant of proportionality is the coefficient of static friction μ > 0. Suppose a 100-lb block rests on a plane that is tilted at an angle of θ = 20° to the horizontal.
a. Find |Wpar |and |Wperp | (Hint: it is not necessary to find Wpar and Wperp first.)
b. The condition for the block not sliding is |Wpar| < μ |Wperp|. If μ = 0.65, does the block slide?
c. What is the critical angle above which the block slides?
Ministry of Higher Education &
Scientific Research
Babylon University
College of Engineering -
Al musayab
Subject :Engineering Analysis
Time: 80 min
Date:11-12-2022
Automobile Department
2nd month exam / 1" semester (2022-2023)
Note: Answer all questions,all questions have same degree.
کورس اول
شعر 3
Q1/: Use a Power series to solve the differential equation:
y" - xy = 0
Q2/:Evaluate using Cauchy's residue theorem,
sinnz²+cosz²
dz, where C is z = 3
(z-1)(z-2)
Q3/:Evaluate
dz
(z²+4)2
Where C is the circle /z-i/-2,using Cauchy's residue theorem.
Examiner: Dr. Wisam N. Hassan
Ministry of Higher Education &
Scientific Research
Babylon University
College of Engineering -
Al musayab
Subject :Engineering Analysis
Time: 80 min
Date:11-12-2022
Automobile Department
2nd month exam / 1" semester (2022-2023)
Note: Answer all questions,all questions have same degree.
کورس اول
شعر 3
Q1/: Use a Power series to solve the differential equation:
y" - xy = 0
Q2/:Evaluate using Cauchy's residue theorem,
sinnz²+cosz²
dz, where C is z = 3
(z-1)(z-2)
Q3/:Evaluate
dz
(z²+4)2
Where C is the circle /z-i/-2,using Cauchy's residue theorem.
Examiner: Dr. Wisam N. Hassan
Which degenerate conic is formed when a double cone is sliced through the apex by a plane parallel to the slant edge of the cone?
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