According to parallel axis theorem, the moment of inertia of a section about an axis parallel to the axis through center of gravity (i.e. IP) is given by(where, A = Area of the section, IG = Moment of inertia of the section about an axis passing through its C.G., and h = Distance between C.G. and the parallel axis.)

Engineering Mechanics
According to parallel axis theorem, the moment of inertia of a section about an axis parallel to the axis through center of gravity (i.e. IP) is given by(where, A = Area of the section, IG = Moment of inertia of the section about an axis passing through its C.G., and h = Distance between C.G. and the parallel axis.)

IP = IG - Ah2

IP = IG + Ah2

IP = IG / Ah2

IP = Ah2 / IG

IP = IG - Ah2

IP = IG + Ah2

IP = IG / Ah2

IP = Ah2 / IG

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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

100

400

200

50

100

400

200

50

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Engineering Mechanics
The loss of kinetic energy during inelastic impact, is given by (where m1 = Mass of the first body,m2 = Mass of the second body, and u1 and u2 = Velocities of the first and second bodies respectively.)

[m₁ m₂/2(m₁ + m₂)] (u₁² - u₂²)

[2(m₁ + m₂)/m₁ m₂] (u₁² - u₂²)

[m₁ m₂/2(m₁ + m₂)] (u₁ - u₂)²

[2(m₁ + m₂)/m₁ m₂] (u₁ - u₂)²

[m₁ m₂/2(m₁ + m₂)] (u₁² - u₂²)

[2(m₁ + m₂)/m₁ m₂] (u₁² - u₂²)

[m₁ m₂/2(m₁ + m₂)] (u₁ - u₂)²

[2(m₁ + m₂)/m₁ m₂] (u₁ - u₂)²

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Engineering Mechanics
A block of mass 20 kg lying on a rough horizontal plane is connected by a light string passing over a smooth pulley to another mass 5 kg, which can move freely in the Vertical direction, as shown in the below figure. The tension in the string will ___________ with the increase in coefficient of friction.

None of these

Not be effected

Increase

Decrease

None of these

Not be effected

Increase

Decrease

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Engineering Mechanics
The algebraic sum of moments of the forces forming couple about any point in their plane is

Constant

Equal to the moment of the couple

Both of above are wrong

Both of above are correct

Constant

Equal to the moment of the couple

Both of above are wrong

Both of above are correct

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Engineering Mechanics
A semicircular disc rests on a horizontal surface with its top flat surface horizontal and circular portion touching down. The coefficient of friction between semi circular disc and horizontal surface is µ. This disc is to be pulled by a horizontal force applied at one edge and it always remains horizontal. When the disc is about to start moving, its top horizontal force will

Remain horizontal

Slant up towards direction of pull

Slant down towards direction of pull

None of these

Remain horizontal

Slant up towards direction of pull

Slant down towards direction of pull

None of these

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Engineering Mechanics

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 loss of kinetic energy during inelastic impact, is given by (where m1 = Mass of the first body,m2 = Mass of the second body, and u1 and u2 = Velocities of the first and second bodies respectively.)

Engineering Mechanics The algebraic sum of moments of the forces forming couple about any point in their plane is

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 loss of kinetic energy during inelastic impact, is given by (where m1 = Mass of the first body,m2 = Mass of the second body, and u1 and u2 = Velocities of the first and second bodies respectively.)

Engineering Mechanics
The algebraic sum of moments of the forces forming couple about any point in their plane is