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Engineering Mechanics

Engineering Mechanics
The acceleration of a particle moving with simple harmonic motion, at any instant is given by

ω2.y
ω.y
ω2/y
ω3.y

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Engineering Mechanics
On a ladder resting on smooth ground and leaning against vertical wall, the force of friction will be

Downwards at its upper end
Away from the wall at its upper end
Towards the wall at its upper end
Upwards at its upper end

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Engineering Mechanics
If a suspended body is struck at the center of percussion, then the pressure on die axis passing through the point of suspension will be

Maximum
Infinity
Minimum
Zero

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Engineering Mechanics
If two bodies having masses m1 and m2 (m1>m2) have equal kinetic energies, the momentum of body having mass m1 is _________ the momentum of body having mass m2.

None of these
Equal to
Less than
Greater than

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

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

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Engineering Mechanics
When a body of mass moment of inertia 'I' (about a given axis) is rotated about that axis with an angular velocity to, then the kinetic energy of rotation is

0.5 Iω
Iω
Iω2
0.5 Iω2

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