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Statics
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| Statics is the branch of mechanics which deals with the study of bodies at rest under a number of forces, the equilibrium, conditions of equilibrium, types of equilibrium and torque etc. | |||
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Equilibrium
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A body is said to be in equilibrium if it is at rest or
moving with uniform velocity. In other words if the linear and angular acceleration of a body are zero, the body is said to be in equilibrium. Or we can say that when two or more forces act on a body such that their resultant or combining effect on the body is Zero and the body retains its state of rest or of uniform motion then the body is said to be in equilibrium. |
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Example
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| A book lying on the table, suspended bodies, all stationary bodies , jump by using parachute. | |||
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Types
of equilibrium
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| With
respect to the state of a body, equilibrium may be divided into two categories: 1. Static equilibrium. 2. Dynamic equilibrium. For latest information , free computer courses and high impact notes visit : www.citycollegiate.com |
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Static
equilibrium
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| If
the combined effect of all the forces acting on a body is zero and the body
is in the state of rest then its equilibrium is termed
as static equilibrium. For example: All stationary bodies |
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Dynamic
equilibrium
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| when
a body is in state of uniform motion and the resultant of all the forces acting
upon it is zero then it is said to be in dynamic equilibrium. For example: Jump by using parachute. |
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Conditions
of equilibrium
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| There are two conditions of equilibrium are as follows | |||
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First
condition of equilibrium
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| The first condition of equilibrium stated as follow: | |||
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To
maintain the transitional equilibrium in a body the vector sum of all
the forces acting on the body is equal to zero |
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| In
other words we can say that to maintain equilibrium the sum of all the forces
acting along X-axis is zero and the sum of all
the forces acting along Y-axis is zero. i.e. |
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Second
condition of equilibrium
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| The second condition of equilibrium stated as follow: | |||
| A
body will be in rotational equilibrium when the algebraic sum of clock wise
torque and anti clock wise torque is zero. In other words: A body will be in rotational equilibrium if vector sum of all the torque acting on the body is zero. |
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| For latest information , free computer courses and high impact notes visit : www.citycollegiate.com | |||