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Units And Measurement

Question

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What is the significance of defining the center of mass of a system?

Solution

The motion of n particle system can be reduced to one particle motion.
An equivalent single point object would enable us to discuss the overall motion of the system.

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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