Find the length of a simple pendulum whose time period of oscillation is 1.8sec at a place where the g value is 9.8m/sec square
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Chapter2
Measurement of Physical quantities in PhysicsIntroduction
You have studied in the last chapter, the fundamentals of scientific study inrelevance to the subject Physics, the science of physical phenomenon of nature. Youcan now proceed to frame the hypothesis/theory/law to explain any physicalphenomenon of nature. But as we have already discussed that there is no meaningof words until unless our theory or law is based on certain physical parameters of study or may be called as physical quantities, those could be expressed andmeasured quantitatively. These quantities are the basis of experimental validation of the theory propounded. Now we shall try to understand the concept of physicalquantities regarding their definition and their use in interpreting the laws of Physics.At the same time regarding measurement of these quantities, we shall glance overthe different standards of measurements prevailing world wide to quantitativelymeasure physical quantities and how these standards make computations involvingphysical quantities make so simple.
Unit One
Now in this unit of about half an hour you will be able to learna) Concept of fundamental and derived quantity. b) System of measurements in practice.c) System of measurements in S.I. system.d) System of units and conversion of units from one
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As we know the T=2π√L/g So 1.8=2π√L/9.8 1.8/2*3.14=√L. /9.8 (0.286)^2=L/9.8 0.081*9.8=L L=0.801
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