Cases of equilibrium , Mechanical Engineering

Cases of equilibrium:

What are cases of equilibrium?

Sol.: As a result of the acting forces, the body may be having one of the following states:

(1) The body can move in any one direction:

If the body may move in any one direction it means that there is some resultant force acting on it. A small consideration will show that if the body is at rest or in equilibrium, the resultant force causing movement should be zero. Or H and V must be zero.

ΣH = 0       and       ΣV = 0

(2) The body can rotate about itself without moving:

It means that there is single resultant force acting on it with no resultant force. A small consideration will show that if the body is at rest or in equilibrium, the moment of couple which causes rotation should be zero. Or we can say that

ΣM = 0

(3) The body can move in any one direction, and at the same time it can also rotate about itself:

It means that there is resultant force and resultant couple acting on it. A small consideration will show that if the body is to be at rest or in the equilibrium, the resultant force causing movement and the resultant moment of couple causing rotation should be zero. That is

ΣH = 0,     ΣV = 0     and         ΣM = 0

(4) The body can be completely at rest:

It means that there is neither resultant force nor a couple acting on it. A small consideration will show that in this case the following condition are satisfied already:

ΣH = 0,      ΣV = 0 and           ΣM = 0

 

Posted Date: 10/16/2012 7:28:57 AM | Location : United States







Related Discussions:- Cases of equilibrium , Assignment Help, Ask Question on Cases of equilibrium , Get Answer, Expert's Help, Cases of equilibrium Discussions

Write discussion on Cases of equilibrium
Your posts are moderated
Related Questions
impartance of moulding sand

Draw the bending moment diagram and shear force diagram: A cantilever beam of 8 m length is subjected to point loads of 15 kN, 10 kN, 25 kN and 20 kN at distances of 4 m, 2 m,

What is ignition angle offset

Q. Source of Materials? The user may restrict sources of fabrication materials. If there is a restriction, the prospective manufacturers must be informed at the time of biddin

describe advantages of limitation and effect of cold working?

Theory of Constraints: Goldratt's theory of constraint has attracted the attention of several practioners in the industry. His concept of goal, constraint, and throughput, cri

(a) What are the disadvantages of not washing a motorcycle before servicing it? (b) List the parts on which water should not fall directly. (c) Write down the steps for washing and


what is the practical application of worm and worm gear

#constructional features and working of Multiplate Dry Clutch