Engineering Mechanics
The maximum frictional force which comes into play when a body just begins to slide over another surface is called

Rolling friction
Limiting friction
Sliding friction
Kinematic friction

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Engineering Mechanics
Angle of friction is the

Angle between normal reaction and the resultant of normal reaction and the limiting friction
The ratio of minimum friction force to the friction force acting when the body is just about to move
Ratio of limiting friction and normal reaction
The ratio of minimum friction force to friction force acting when the body is in motion

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

The velocity, with which a projectile is projected, is known as the velocity of projection.
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.
All of these

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