If rain is falling in the opposite direction of the movement of a pedestrain, he has to hold his umbrella___________________?

A. More inclined when moving
B. Less inclined when moving
C. More inclined when standing
D. Less inclined when standing

A body of weight W on inclined plane of a being pulled up by a horizontal force P will be on the point of motion up the plane when P is equal to________________?

A. W
B. W sin (a + $)
C. Wtan(a + <|))
D. W\an(a-)

Coefficient of friction is the_________________?

A. Angle between normal reaction and the resultant of normal reaction and the 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

On the ladder resting on the ground and leaning against a smooth vertical wall, the force of friction will be_________________?

A. Downwards at its upper end
B. Upwards at its upper end
C. Perpendicular to the wall at its upper end
D. Zero at its upper end

Friction force for dry surfaces. Friction force is________________? Pick up wrong statement?

A. Proportional to normal load between the surfaces
B. Dependent on the materials of contact surface
C. Proportional to velocity of sliding
D. Independent of the area of contact surfaces

The weight of a body is due to ___________________?

A. centripetal force of earth
B. gravitational pull exerted by the earth
C. forces experienced by body in atmosphere
D. force of attraction experienced by particles

When trying to turn a key into a lock, following is applied _____________________?

A. coplanar force
B. non-coplanar forces
C. lever
D. moment

According to principle of transmissibility of forces, the effect of a force upon a body is_________________?

A. Maximum when it acts at the center of gravity of a body
B. Different at different points in its line of action
C. The same at every point in its line of action
D. Minimum when it acts at the c.g. of the body

A number of forces acting at a point will be in equilibrium if_____________________?

A. Their total sum is zero
B. Two resolved parts in two directions at right angles are equal
C. Sum of resolved parts in any two per-pendicular directions are both zero
D. All of them are inclined equally

According to principle of moments__________________?

A. If a system of coplanar forces is in equilibrium, then their algebraic sum is zero
B. If a system of coplanar forces is in equilibrium, then the algebraic sum of their moments about any point in their plane is zero
C. The algebraic sum of the moments of any two forces about any point is equal to moment of theiwesultant about the same point
D. Positive and negative couples can be balanced