The center of gravity of a semi-circle lies at a distance of __________ from its base measured along the vertical radius.

Engineering Mechanics
The center of gravity of a semi-circle lies at a distance of __________ from its base measured along the vertical radius.

3r/ 8

4r/ 3π

3r/4π

8r/3

3r/ 8

4r/ 3π

3r/4π

8r/3

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Engineering Mechanics
In a single threaded worm and worm wheel, the number of teeth on the worm is 50. The diameter of the effort wheel is 100 mm and that of load drum is 50 mm. The velocity ratio is

200

100

50

400

200

100

50

400

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Engineering Mechanics
The maximum efficiency of a screw jack is

(1 - tanφ)/(1 + tanφ)

(1 + sinφ)/(1 - sinφ)

(1 + tanφ)/(1 - tanφ)

(1 - sinφ)/(1 + sinφ)

(1 - tanφ)/(1 + tanφ)

(1 + sinφ)/(1 - sinφ)

(1 + tanφ)/(1 - tanφ)

(1 - sinφ)/(1 + sinφ)

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Engineering Mechanics
Moment of inertia of a rectangular section having width (b) and depth (d) about an axis passing through its C.G. and parallel to the depth (d), is

bd³/12

db³/12

db³/36

bd³/36

bd³/12

db³/12

db³/36

bd³/36

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Engineering Mechanics
Which is the correct statement about law of polygon of forces?

If any number of forces acting at a point can be represented in direction and magnitude by the sides of a polygon taken in order, then the forces are in equilibrium

If any number of forces acting at a point can be represented by the sides of a polygon taken in order, then the forces are in equilibrium

If any number of forces acting at a point can be represented in direction and magnitude by the sides of a polygon, then the forces are in equilibrium

If a polygon representing forces acting at a point is closed then forces are in equilibrium

If any number of forces acting at a point can be represented in direction and magnitude by the sides of a polygon taken in order, then the forces are in equilibrium

If any number of forces acting at a point can be represented by the sides of a polygon taken in order, then the forces are in equilibrium

If any number of forces acting at a point can be represented in direction and magnitude by the sides of a polygon, then the forces are in equilibrium

If a polygon representing forces acting at a point is closed then forces are in equilibrium

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Engineering Mechanics
Moment of inertia is the

Second moment of force

Second moment of area

Second moment of mass

All of these

Second moment of force

Second moment of area

Second moment of mass

All of these

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Engineering Mechanics

Engineering Mechanics The center of gravity of a semi-circle lies at a distance of __________ from its base measured along the vertical radius.

Engineering Mechanics In a single threaded worm and worm wheel, the number of teeth on the worm is 50. The diameter of the effort wheel is 100 mm and that of load drum is 50 mm. The velocity ratio is

Engineering Mechanics The maximum efficiency of a screw jack is

Engineering Mechanics Moment of inertia of a rectangular section having width (b) and depth (d) about an axis passing through its C.G. and parallel to the depth (d), is

Engineering Mechanics Which is the correct statement about law of polygon of forces?

Engineering Mechanics Moment of inertia is the

Engineering Mechanics
The center of gravity of a semi-circle lies at a distance of __________ from its base measured along the vertical radius.

Engineering Mechanics
In a single threaded worm and worm wheel, the number of teeth on the worm is 50. The diameter of the effort wheel is 100 mm and that of load drum is 50 mm. The velocity ratio is

Engineering Mechanics
The maximum efficiency of a screw jack is

Engineering Mechanics
Moment of inertia of a rectangular section having width (b) and depth (d) about an axis passing through its C.G. and parallel to the depth (d), is

Engineering Mechanics
Which is the correct statement about law of polygon of forces?

Engineering Mechanics
Moment of inertia is the