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

All of these
A path, traced by a projectile in the space, is known as trajectory.
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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Engineering Mechanics
The term 'Centroid' is

None of the listed here
The point of suspension
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

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