First Condition of Equilibrium   A body will be in first condition of equilibrium if sum of all forces along X-axis and sum of all forces along Y-axis are equal to zero, then the body is said to be in first condition of equilibrium.   it is not the reading itself that is useful, but…

Equilibrium in Physics   A body will be in equilibrium if the forces acting on it must be cancel the effect of each other.   In the other word we can also write that:   A body is said to be in equilibrium condition if there is no unbalance or net force acting on it.…

Definition of Center of Gravity in Physics   The Centre of Gravity is a point at which the whole weight of the body appears to act.     Centre of Gravity of Regular Shaped Objects   We can find the centre of gravity of any regular shaped body having the following shapes:     Triangle:…

Torque & its Formula   It is the turning effects of a force about an axis of rotation is called moment of force or Torque.     Factors on which Torque Depends   The magnitude of the applied force. The perpendicular distance between axis of rotation and point of application of force.     Representation…

Resultant Force in Physics   The net effect of two or more forces is a single force that is called the resultant force.   Another factor that contributes to the difference in perception is the backward movement of the eyes. “10-15% of eye movements during reading are reversed, that is, the eyes go back and…

Rolling Friction in Physics   Rolling Friction   If we set a heavy spherical ball rolling, it experiences an opposing force called rolling friction. When a body rolls over a surface, the force of friction is called rolling friction. Rolling friction is much less than the sliding friction. This is because the surfaces in contact…

Moment Arm in Physics   The perpendicular distance between the axis of rotation and the line of the action of force is called the moment arm of the force.   “Plus, while you turn the page, you take a short break,” says psychologist David B. Daniel. In that short space, the brain can store the…

Law of Friction in Physics   Statement:   The value of limiting friction increases proportionally with the increase in normal reaction. Hence, liming friction F(s} is directly proportional to the normal reaction.     F(s) < R (Here < represents the sign of proportionality don’t’ write it in the examination paper.)       =>…

Methods of Reducing Friction   Friction can be reduced by the following methods:   The various parts of the machines that are moving over one another are properly lubricated.   In machines, the sliding of various parts is usually replaced by rolling. This is done by using ball bearings.   Where sliding is unavoidable, a…

Advantages and Disadvantages of Friction   Advantages of Friction   We could not walk without the friction between our shoes and the ground. As we try to step forward, we push your foot backward. Friction holds our shoe to the ground allowing you to walk.   Writing with a pencil requires friction. We could not…