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Engineering Mechanics

Engineering Mechanics
The moment of inertia of a thin spherical shell of mass m and radius r, about its diameter is

2mr²/5
mr²/3
3mr²/5
2mr²/3

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Engineering Mechanics
The periodic time (T) is given by (where, ω = Angular velocity of particle in rad/s.)

π/ω
2π × ω
ω/2π
2π/ω

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Engineering Mechanics
The unit of work in S.I. units is

joule
kg-m
erg
Newton

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Engineering Mechanics
The maximum efficiency of a lifting machine is

m/V.R.
V.R./m
1/m
1/(m × V.R.)

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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

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

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Engineering Mechanics
The power developed by a body acted upon by a torque 'T' Newton meter (N - m) and revolving at ω radian/s is given by

T.ω/75 (in kilowatts)
T.ω (in watts)
T.ω/4500 (in kilowatts)
T.ω/60 (in watts)

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