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Units And Measurement

Question

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Under what condition angular momentum of a moving body is zero?

Solution

Angular momentum is given by,
$stack L thin space with rightwards harpoon with barb upwards on top space equals r with rightwards harpoon with barb upwards on top space x space p with rightwards harpoon with barb upwards on top space$
Angular momentum of moving body is zero if either r = 0 or $straight r with rightwards harpoon with barb upwards on top space vertical line vertical line thin space straight p with rightwards harpoon with barb upwards on top$ .

Some More Questions From Units and Measurement Chapter

To measure a physical quantity X, the unit U is repeatedly used for n times. What is the magnitude of physical quantity?

Does the numerical factor in the quantitative measurement depend on the system of unit used?

Is one unit sufficient to measure a physical quantity?

Can a physical quantity have two or more units? Give example.

What are fundamental quantities?

How many fundamental quantities are there in mechanics?

How many fundamental quantities are there in Physics?

Name the fundamental quantities of mechanics.

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