Engineering Mechanics
The total energy possessed by a system of moving bodies

Varies from point to point
Is maximum in the start and minimum at the end
Is minimum in the start and maximum at the end
Is constant at every instant

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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
Which of the following statement is correct in connection with projectiles?

A path, traced by a projectile in the space, is known as trajectory.
All of these
The angle, with the horizontal, at which a projectile is projected, is known as angle of projection.
The velocity, with which a projectile is projected, is known as the velocity of projection.

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