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Units And Measurement

Question

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A body revolving with angular velocity ω about some axis has moment of inertia I. What is the angular momentum and kinetic energy of body?

Solution

Given,
Angular velocity =

straight omega

Moment of Inertia = I

Angular space momentum comma space straight L space equals space Iω space space and comma Kinetic space energy comma space straight K equals 1 half 1 straight omega squared

Some More Questions From Units and Measurement Chapter

What is measurement?

What is the need of measurement?

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?

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