A force acting on a body may_________________?

A. introduce internal stresses
B. balance the other forces acting on it
C. retard its motion
D. change its motion

The unit of force in S.I. units is________________?

A. Kilogram
B. Newton
C. Watt
D. Dyne

Forces are called coplanar when all of them acting on body lie in __________________?

A. One point
B. One plane
C. Different planes
D. Perpendicular planes

Dynamic friction as compared to static friction is___________________?

A. Same
B. More
C. Less
D. May be less of more depending on nature of surfaces and velocity

Limiting force of friction is the__________________?

A. Tangent of angle between normal-reaction and the resultant of normal reaction and limiting friction
B. Ratio of limiting friction and normal reaction
C. The friction force acting when the body is just about to move
D. The friction force acting when the body is in motion

Tangent of angle of friction is equal to__________________?

A. Kinetic friction
B. Limiting friction
C. Angle of repose
D. Coefficient of friction

A semi-circular disc rests on a horizontal surface with its top flat surface horizontal and circular portion touching down. The coefficient of friction between semi-cricular disc and horizontal surface is \i. This disc is to be pulled by a horizontal force applied at one edge and it always remains horizontal. When the disc is about to start moving, its top horizontal force will____________________?

A. Remain horizontal
B. Slant up towards direction of pull
C. Slant down towards direction of pull
D. Unpredictable

The algebraic sum of moments of the forces forming couple about any point in their plane is_________________?

A. Equal to the moment of the couple
B. Constant
C. Both of above are correct
D. Both of above are wrong

The necessary condition for forces to be in equilibrium is that these should be_________________?

A. Coplanar
B. Meet at one point ;
C. Both a. and b. above
D. All be equal

A cable with a uniformly distributed load per horizontal meter run will take the following shape________________?

A. Straight line
B. Parabola
C. Hyperbola
D. Elliptical