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Engineering Mechanics

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
P + Q
Q / P

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Engineering Mechanics
The time of flight (t) of a projectile on a horizontal plane is given by

t = 2u. sinα/g
t = 2u. tanα/g
t = 2u/g.sinα
t = 2u. cosα/g

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Engineering Mechanics
In order to completely specify angular displacement by a vector, it must fix

All of these
Magnitude of angular displacement
Sense of angular displacement
Direction of the axis of rotation

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

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Engineering Mechanics
If a suspended body is struck at the center of percussion, then the pressure on die axis passing through the point of suspension will be

Minimum
Maximum
Infinity
Zero

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Engineering Mechanics
A body of weight 'W' is required to move up on rough inclined plane whose angle of inclination with the horizontal is 'α'. The effort applied parallel to the plane is given by (where μ = tanφ = Coefficient of friction between the plane and the body.)

P = W tan (α + φ)
P = W tanα
P = W (cosα + μsinα)
P = W (sinα + μcosα)

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