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Engineering Mechanics

Engineering Mechanics
The moment of inertia of a solid cone of mass ‘m’ and base radius ‘r’ about its vertical axis is

3mr²/5
2mr²/5
4mr²/5
3mr²/10

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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

Kinematic friction
Rolling friction
Sliding friction
Limiting friction

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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

20 N
40 N
None of the listed here
120 N

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Engineering Mechanics
The ratio of static friction to dynamic friction is always

Less than one
None of these
Greater than one
Equal to one

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Engineering Mechanics
The power developed by a body acted upon by a torque 'T' Newton meter (N - m) and revolving at ω radian/s is given by

T.ω/60 (in watts)
T.ω/75 (in kilowatts)
T.ω (in watts)
T.ω/4500 (in kilowatts)

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Engineering Mechanics
A trolley wire weighs 1.2 kg per meter length. The ends of the wire are attached to two poles 20 meters apart. If the horizontal tension is 1500 kg find the dip in the middle of the span

3.0 cm
4.0 cm
2.5 cm
5.0 cm

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