Exercise: Engineering Mechanics

Questions for: Engineering Mechanics

A ladder is resting on a rough ground and leaning against a smooth vertical wall. The force of friction will act
A:
downward at its upper end
B:
upward at its upper end
C:
zero at its upper end
D:
perpendicular to the wall at its upper end
Answer: C
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A body is said to move or vibrate with simple harmonic motion if its acceleration is directed towards the mean position.
A:
True
B:
False
C:
D:
Answer: A
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The moment of inertia of a solid cone of mass m and base radius r about its vertical axis is
A:
3mr2/5
B:
3mr2/10
C:
2mr2/5
D:
4mr2/5
Answer: B
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The unit of force in S.I. system of units is
A:
dyne
B:
kilogram
C:
newton
D:
watt
Answer: C
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The velocity ratio of a simple wheel and axle with D and d as the diameters of effort wheel and load axle, is
A:
D + d
B:
D - d
C:
D x d
D:
D / d
Answer: D
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