CHARACTERTICS OF GRAVITATIONAL FORCE

i)                 It is always attractiveii)             It is independent of the medium between the bodies. In contrast electric and magnetic forces are medium dependent.iii)          It holds good over a wide range of distances ranging from interatomic distance...

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GRAVITATION

INTRODUCTION We are already familiar with the term ‘gravity’ and ‘gravitation’ from chapter 3 and 5, in which kinematics of freely falling objects under gravity and conservation force were discussed. Galileo studied the motion of falling bodies systematically. Newton was the first to realize that the weight of the object on the earth’s surface was due to the force of attraction between the objects and the earth. He also realized that this attraction...

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VECTORS

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TYPES OF UNCERTAINTIES

Uncertainties can be broadly classified into two categories.1)   Uncertainties due to known causee systematic uncertainty2)       Uncertainty due to known causes- Random uncertainty Systematic uncertaintyThey may arise due to various reasons. For example,(i) Incorrect design or calibration of the instrument gives certain uncertainty in the measurement. Limitations of the methods used for measurements...

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TYPES OF PHYSICAL QUANTITIES

Physical quantities may be variable and constants. They may have dimension or could be dimensionless. i)                 DIMENSIONAL VARIABLE: These are the quantities which are variable and have dimensions as well. example Velocity, acceleration, force, etc.ii)             Dimensional constant: These are the...

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TABLE1.6: SOME DIMENSIONAL FORMULAE AND SI UNITS S.N Physical Quantities Symbol Relation with other physical quantities Dimensional Formula SI Unit CGS Unit 1 AREA A, s Length ×breadth L×L=[l]² M² Cm² 2 VOLUME V LENGTH×BREADTH×HEIGHT L×L×L=[L³] m³ cm³,cc 3 FREQUENCY F, v, n 1/time period 1/[t]=[T-1] Hertz=s-1Hz cycle/s Hertz=s-1 Hz cycles/s 4 DENSITY ρ Mass/volume M/l³=[ml-3]...

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DEFINATION OF BASE UNITS

1.METER: In a1960 a meter was defined to be the equal to 1650763.73 wavelength of orange red light( of wavelength 6.0578021*10^-7m) emitted in vacuum by krypton-86 gas due to transition from 5d^5 to 2p^10 levels. In 1963 it was redefined in terms of speed of light in vacuum as the length of path traveled by light during a time interval of  1/2,99,792,458 of a second. KILOGRAM: A kilogram is equal to the mass of a cylinder of platinum – iridium...

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