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Engineering Mechanics

Engineering Mechanics
Moment of inertia is the

Second moment of area
Second moment of force
Second moment of mass
All of these

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

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

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Engineering Mechanics
The centre of percussion is below the centre of gravity of the body and is at a distance equal to

h/kG
h × kG
kG2/h
h2/kG

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Engineering Mechanics
Whenever a force acts on a body and the body undergoes a displacement, then

Work is said to be done
None of these
Body has kinetic energy of translation
Power is being transmitted

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Engineering Mechanics
If ‘P’ is the force acting on the body, ‘m’ is the mass of the body and ‘a’ is the acceleration of the body, then according to Newton's second law of motion,

P + m.a = 0
P/m.a = 0
P × m.a = 0
P - m.a = 0

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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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