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Civil Engineering - Applied Mechanics

Exercise : Applied Mechanics - Section 2
26.
A spring scale in a stationary lift shows a reading of 60 kg for a man standing on it. If the lift starts descending at an acceleration of g/5, the scale reading would be
48 kg
60 kg
72 kg
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
27.
The resolved part of the resultant of two forces inclined at an angle θ in a given direction is
algebraic sum of the resolved parts of the forces in the direction
arithmetical sum of the resolved parts of the forces in the direction
difference of the forces multiplied by cosine θ°
sum of the forces multiplied by the sine θ
sum of the forces multiplied by the tangent θ°.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
28.
The velocity ratio of the differential wheel and axle is
Answer: Option
Explanation:
No answer description is available. Let's discuss.
29.
The following statement is one of the laws of Dynamic friction
The force of friction always acts in a direction opposite to that in which a body is moving
The magnitude of the kinetic friction bears a constant ratio to the normal reaction between two surfaces. The ratio being slightly less than that in the case of limiting friction
For moderate speeds the force of friction remains constant but decreases slightly with the increase of speed
all the above.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
30.
A 50 kg boy climbs up a 8 m rope in gymnasiam in 10 sec. The average power developed by the boy is approximately
400 watts
500 watts
4000 watts
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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