Exercise: Engineering Mechanics

Questions for: Engineering Mechanics

A block ot mass 20 kg lying on a rough horizontal plane is connected by a light string passing over a smooth pulley to another mass 5 kg, which can move freely in the Vertical direction, as shown in the below figure. The tension in the string will __________ with the increase in coefficient of friction.
A:
increase
B:
decrease
C:
not be effected
D:
Answer: A
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Varingon's theorem of moments states that if a number of coplaner forces acting on a particle are in equilibrium, then
A:
their algebraic sum is zero
B:
their lines of action are at equal distances
C:
the algebraic sum of their moments about any point in their plane is zero
D:
the algebraic sum of their moments about any point is equal to the moment of their resultant force about the same point.
Answer: D
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The velocity of a particle (v) moving with simple harmonic motion, at any instant is given by(where r = Amplitude of motion, and y = Displacement of the particle from mean position.)
A:
B:
C:
D:
Answer: B
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A smooth cylinder lying on a __________ is in neutral equilibrium.
A:
curved surface
B:
convex surface
C:
horizontal surface
D:
Answer: C
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The polygon law of forces states that if a number of forces, acting simultaneously on a particle, be represented in magnitude and direction by the sides a polygon taken in order, then their resultant is represented in magnitude and direction by the closing side of the polygon, taken in opposite direction.
A:
Correct
B:
Incorrect
C:
D:
Answer: A
No answer description is available. Let's discuss.
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