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What is strain?  Strain is defined as the change in dimension per unit original dimensions is called as strain They are two types of strain 1 ) Longitudin…

Laws of simple pendulum 1) law of length : the period of simple pendulum is directly proportional to under root of its length 2) law of gravity : the pe…

what is critical velocity ?  Def : the minimum horizontal velocity with which satellite revolving around the earth in a circular orbit is called as crit…

What is simple harmonic motion ?  The simple harmonic motion is defined as the periodic motion in which restoring force is directed towards mean positio…

Kepler's law of motion 1) every planet revolve in an elliptical Orbit with sun situated at one of the focii of the ellipse 2) the radius vector drawn …

What is satellite ?  Def : satellite is a body (natural or artificial) which revolve around the earth in circular orbit  What is period of satellite ? The…

Newton's law of gravitation Statement : every particle of matter attract with other particle with a force which is directly proportional to product o…