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Engineering Mechanics

Engineering Mechanics
The velocity ratio for the first system of pulleys is (where n is the number of pulleys.)

n
n²
2n
2n - 1

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Engineering Mechanics
The moment of inertia of a square of side a about its diagonal is

a⁴/16
a²/8
a⁴/12
a³/12

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Engineering Mechanics
The skidding away of the vehicle on a level circular path can be avoided if the force of friction between the wheels and the ground is __________ the centrifugal force.

None of these
Less than
Equal to
Greater than

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Engineering Mechanics
The maximum frictional force which comes into play when a body just begins to slide over another surface is called

Sliding friction
Limiting friction
Rolling friction
Kinematic friction

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Engineering Mechanics
The time of flight (t) of a projectile on a horizontal plane is given by

t = 2u. tanα/g
t = 2u. cosα/g
t = 2u/g.sinα
t = 2u. sinα/g

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Engineering Mechanics
Two forces are acting at an angle of 120°. The bigger force is 40 N and the resultant is perpendicular to the smaller one. The smaller force is

120 N
40 N
None of the listed here
20 N

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