Engineering Mechanics
The algebraic sum of moments of the forces forming couple about any point in their plane is

Constant
Both of above are wrong
Equal to the moment of the couple
Both of above are correct

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Engineering Mechanics
The term 'Centroid' is

None of the listed here
The same as centre of gravity
The point of application of the resultant of all the forces tending to cause a body to rotate about a certain axis
The point of suspension

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Engineering Mechanics
The Cartesian equation of trajectory is (where u = Velocity of projection, α = Angle of projection, and x, y = Co-ordinates of any point on the trajectory after t seconds.)

y = x. tanα - (gx²/2u² cos²α)
y = (gx²/2u² cos²α) + x. tanα
y = (gx²/2u² cos²α) - x. tanα
y = x. tanα + (gx²/2u² cos²α)

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