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Engineering Mechanics

Engineering Mechanics
The velocity ratio of a first system of pulleys with 4 pulleys is

8
16
20
4

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Engineering Mechanics
Centre of gravity of a solid cone lies on the axis at the height

One third of the total height above base
One fourth of the total height above base
One-half of the total height above base
Three eighth of the total height above the base

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Engineering Mechanics
A machine having an efficiency less than 50%, is known as

Ideal machine
Non-reversible machine
Neither reversible nor non-reversible machine
Reversible machine

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Engineering Mechanics
A weight of 1000 N can be lifted by an effort of 80 N. If the velocity ratio is 20, the machine is

None of these
Reversible
Non-reversible
Ideal

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Engineering Mechanics
The total motion possessed by a body, is called

Mass
Impulsive force
Momentum
Weight

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Engineering Mechanics
If a body is acted upon by a number of coplanar non-concurrent forces, it may

All of these
Move in any one direction rotating about itself
Rotate about itself without moving
Be completely at rest

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