Module 2

The process of finding out the resultant force is called __________ of forces.

• composition

• resolution

• NONE

• Integration

If three forces acting at a point are represented in magnitude and direction by the three sides of a triangle, taken in order, then the forces are in equilibrium forces can be calculated using the Lamis theorem.

• True

• False

• NONE

• NONE

The resultant of two forces P and Q acting at an angle θ is

• A

• B

• C

• D

The polygon law of forces states that if a number of forces, acting simultaneously on a particle, be represented in magnitude and direction by the sides a polygon taken in order, then their resultant is represented in magnitude and direction by the closing side of the polygon, taken in opposite direction.

• FALSE

• TRUE

• NONE

• NONE

Varingon's theorem of moments states that if a number of coplaner forces acting on a particle are in equilibrium, then

• their algebraic sum is zero

• The algebraic sum of their moments about any point is equal to the force of their resultant force about the same point.

• Their plane is zero

• The algebraic sum of their moments about any point is equal to the moment of their resultant force about the same point.

The friction experienced by a body, when in motion, is known as

• rolling friction

• dynamic friction

• limiting friction

• static friction

Coefficient of friction is the ratio of the limiting friction to the normal reaction between the two bodies.

• True

• False

• none

• none

Law of Transmissibility of force is applicable to all the body

(The point of application of force can be changed from one point to other provided same magnitude and direction and same line of action )

• True

• False

• None

• None

What type of force system?

• Coplanar concurrent force system

• Non coplanar concurrent force system

• Coplanar nonconcurrent force system

• None of the above

Assumptions in engineering mechanics

• The body is treated as continuum.

  (A body consists of several particles. Each particle can be subdivided into molecules, atoms and electrons etc. It is not feasible to solve an engineering problem by treating a body as a conglomeration of such discrete particles. The body is assumed to consist of a continuous distribution of matter. In other words, )

• Only rigid body considered

• Only point load considered

• All of the above