Engineering Mechanics
A spherical body is symmetrical about its perpendicular axis. According to Routh's rule, the moment of inertia of a body about an axis passing through its centre of gravity is (where, M = Mass of the body, and S = Sum of the squares of the two semi-axes.)

None of these
MS/5
MS/3
MS/4

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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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Engineering Mechanics
Coplanar concurrent forces are those forces which

Meet at one point and their lines of action also lie on the same plane
Meet at one point, but their lines of action do not lie on the same plane
Do not meet at one point and their lines of action do not lie on the same plane
Do not meet at one point, but their lines of action lie on the same plane

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