Center Of Gravity And Centroid | Engineering Mechanics

Locate the center of gravity of the volume generated by revolving the shaded area about the z axis. The material is homogeneous.

Byadmin July 25, 2022

Question: Locate the center of gravity of the volume generated by revolving the shaded area about the z axis. The material is homogeneous.
[A].

= 2.80 ft

[B].

= 2.50 ft

[C].

= 2.67 ft

[D].

= 3.00 ft

Answer: Option C

Explanation:

No answer description available for this question.

Engineering Mechanics | Mechanical Engineering

A body of weight W is required to move up on rough inclined plane whose angle of inclination with the horizontal is α. The effort applied parallel to the plane is given by(where μ = tanφ = Coefficient of friction between the plane and the body.)

Question: A body of weight W is required to move up on rough inclined plane whose angle of inclination with the horizontal is α. The effort applied parallel to the plane is given by(where μ = tanφ = Coefficient of friction between the plane and the body.)
[A].

P = W tanα
[B].
P = W tan(α + φ)
[C].
P = W (sinα + μcosα)
[D].
P = W (cosα + μsinα)

Answer: Option C

Explanation:

No answer description available for this question.

Read More A body of weight W is required to move up on rough inclined plane whose angle of inclination with the horizontal is α. The effort applied parallel to the plane is given by(where μ = tanφ = Coefficient of friction between the plane and the body.)
Engineering Mechanics | Mechanical Engineering

For a self locking machine, the efficiency must be

Question: For a self locking machine, the efficiency must be
[A].

equal to 50%
[B].
less than 50%
[C].
greater than 50%
[D].
100%

Answer: Option B

Explanation:

No answer description available for this question.

Read More For a self locking machine, the efficiency must be
Engineering Mechanics

Tangent of angle of friction is equal to__________________?

Tangent of angle of friction is equal to__________________?

A. kinetic friction
B. limiting friction
C. angle of repose
D. coefficient of friction
E. friction force

Read More Tangent of angle of friction is equal to__________________?
Engineering Mechanics

A force acting on a body may_________________?

A force acting on a body may_________________?

A. introduce internal stresses
B. balance the other forces acting on it
C. retard its motion
D. change its motion
E. all of the above

Read More A force acting on a body may_________________?
Engineering Mechanics

Angle of friction is the_______________________?

Angle of friction is the_______________________?

A. angle between normal reaction and the resultant of normal reaction and the limiting friction
B. ratio of limiting friction and normal reaction
C. the ratio of minimum friction force to the friction force acting when the body is just about to move
D. the ratio of minimum friction force to friction force acting when the body is in motion
E. ratio of static and dynamic friction

Read More Angle of friction is the_______________________?
Engineering Mechanics

A heavy string attached at two ends at same horizontal level and when central dip is very small approaches the following curve ____________________?

A heavy string attached at two ends at same horizontal level and when central dip is very small approaches the following curve ____________________?

A. catenary
B. parabola
C. hyperbola
D. elliptical
E. circular arc

Read More A heavy string attached at two ends at same horizontal level and when central dip is very small approaches the following curve ____________________?

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