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Units And Measurement

Question

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A body consists of 'n' identical particles. What is the radius of gyration of the body about a given axis?

Solution

The radius of gyration about a given axis is the root mean square distance of constituent particles from the axis.

Some More Questions From Units and Measurement Chapter

Define physical quantity.

Give four examples of physical quantities.

Define unit.

What are the two main required characteristics of a unit?

Can we use same units for different physical quantities?

Can we use different units to measure same physical quantity?

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?

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