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Engineering Mechanics

Engineering Mechanics
A pendulum which executes one beat per second is known as

Second's pendulum
Compound pendulum
Torsional pendulum
Simple pendulum

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Engineering Mechanics
The total energy possessed by a system of moving bodies

Is maximum in the start and minimum at the end
Varies from point to point
Is minimum in the start and maximum at the end
Is constant at every instant

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Engineering Mechanics
The velocity ratio of a single purchase crab winch can be increased by

Increasing the number of teeth of the pinion
Increasing the radius of the load drum
Increasing the length of the handle
All of these

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Engineering Mechanics
The rate of doing work is known as

Power
None of these
Potential energy
Kinetic energy

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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 = Ah2 / IG
IP = IG - Ah2

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Engineering Mechanics
The range of a projectile is maximum, when the angle of projection is

90°
45°
30°
60°

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