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Engineering Mechanics

Engineering Mechanics
A pendulum which executes one beat per second is known as

Compound pendulum
Simple pendulum
Torsional pendulum
Second's pendulum

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Engineering Mechanics
The mechanical advantage of a lifting machine is the ratio of

All of these
Load lifted to the effort applied
Output to the input
Distance moved by effort to the distance moved by load

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Engineering Mechanics
If the resultant of two equal forces has the same magnitude as either of the forces, then the angle between the two forces is

60°
120°
90°
30°

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Engineering Mechanics
The resultant of two forces P and Q (such that P > Q) acting along the same straight line, but in opposite direction, is given by

P + Q
P / Q
Q / P
P - Q

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Engineering Mechanics
A force while acting on a body may

Change its motion
All of these
Balance the forces, already acting on it
Give rise to the internal stresses in it

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Engineering Mechanics
The frequency of oscillation of a compound pendulum is (where kG = Radius of gyration about the centroidal axis, and h = Distance between the point of suspension and C.G. of the body.)

1/2π. √(gh/kG² + h²)
1/2π. √(kG² + h²/gh)
2π. √(kG² + h²/gh)
2π. √(gh/kG² + h²)

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